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Unlike Dragon Age, the chosen class in Mass Effect only affects the abilities of the main character. However, how diverse these abilities are remains to be seen in battle... or in short reviews from BioWare themselves.

Soldier
Soldiers use an ocular synoptic processor, allowing them to aim more precisely at selected targets. Whether they are shooting down Geth from a distance or tearing apart several nearby Vorcha with shotgun blasts, Soldiers can eliminate any obstacle with a barrage of fire. This is the only class capable of using assault rifles, as well as all other possible types of weapons and ammunition. When Soldiers activate the Adrenaline Surge ability, time slows down for them, giving them seconds of advantage to aim firmly and hit enemies. In addition, when the battle intensifies, Soldiers can use the Shatter ability, a shockwave that knocks down surrounding enemies.


A fundamental class - a specialist in any type of weapon, extremely resilient and strong.
Engineer
Engineers are technical specialists, the only class capable of summoning combat drones to the battlefield. Drones can distract enemy fire and lure them out of cover. Engineers can hack mechanical enemies and turn them into powerful allies. Upgrade your drones - improve their weapons or turn them into deadly bombs. Engineers also have other abilities, such as "Incinerate" and "Overload".


A highly specialized class, inheriting something from certified electronics geniuses.
Adept
An Adept, equipped with L5x implants, is a specialist capable of disabling or killing enemies using their biotic abilities. Adepts are the only class capable of summoning Singularity - a deadly biotic trap. When enemies hide behind cover, an adept can use the "Pull" ability and pull them out of cover. Adepts can use the "Push" ability and knock enemies off cliffs and ledges. The Adept is a game class capable of dealing with enemies without firing a single shot.


A typical mage, who is better described as a "superhuman", with all the advantages and disadvantages that come with it.
Infiltrator
Infiltrators are technical and combat specialists, the only class capable of remaining undetected by the enemy. They are deadly at any distance due to their wide range of weapons, equipment, and abilities, allowing them to hit even the most armored and protected enemies. Thanks to their skill in using sniper rifles, Infiltrators can destroy an enemy from a safe distance before entering the fray. In addition, by combining types of ammunition and skillful positioning on the battlefield, Infiltrators can easily deal with both organic and synthetic enemies. When the situation intensifies, Infiltrators can use Tactical Cloak to hide from enemies before returning to the battle in any desired location relative to the remaining enemies.


A mixed class of soldier and engineer, however, unlike the first part, it is so individual that it is quite suitable for fans of assassin-thief tactics.
Vanguard
Vanguards are equipped with L5n implants, providing them with powerful biotic abilities. Combined with their weapons training, this is a deadly combination in close-quarters combat. Vanguards can instantly close the distance to an enemy using their unique Biotic Charge ability. Possessing immense biotic power, Vanguards use Charge to cross any obstacles, collide with the targeted enemy, and send them flying. In addition, Vanguards can unleash an explosive Shockwave, knocking down enemies and knocking them out of cover. If a Vanguard finds himself in a too difficult situation, he can also use Charge to quickly move to a safe place.


A mixed class of soldier and adept, also distinguished by its special individuality. Perhaps its tactics can be compared to those of a berserker.
Sentinel
Sentinels successfully use both technical and biotic abilities on the battlefield. They are always ready for any situation. After overloading an enemy's shield, Sentinels can easily knock the enemy back with their biotic abilities. And if things get too hot, they can use Cryo-Freeze and gain precious seconds to destroy the enemy or find cover.
Sentinels are equipped with the most advanced technical armor. When overloaded, the system releases the accumulated charge and stuns all enemies in the immediate vicinity.


A mixed class of engineer and adept, also possesses high individuality and, as you can see, is extremely armored. To compare it to something specific is difficult; I think it's best to try it yourself.
Let's discuss, ask questions, and choose - discussions are welcome:)

Soldier
Soldiers use an ocular synoptic processor, allowing them to aim more precisely at selected targets. Whether they are shooting down Geth from a distance or tearing apart several nearby Vorcha with shotgun blasts, Soldiers can eliminate any obstacle with a barrage of fire. This is the only class capable of using assault rifles, as well as all other possible types of weapons and ammunition. When Soldiers activate the Adrenaline Surge ability, time slows down for them, giving them seconds of advantage to aim firmly and hit enemies. In addition, when the battle intensifies, Soldiers can use the Shatter ability, a shockwave that knocks down surrounding enemies.
A fundamental class - a specialist in any type of weapon, extremely resilient and strong.
Engineer
Engineers are technical specialists, the only class capable of summoning combat drones to the battlefield. Drones can distract enemy fire and lure them out of cover. Engineers can hack mechanical enemies and turn them into powerful allies. Upgrade your drones - improve their weapons or turn them into deadly bombs. Engineers also have other abilities, such as "Incinerate" and "Overload".
A highly specialized class, inheriting something from certified electronics geniuses.
Adept
An Adept, equipped with L5x implants, is a specialist capable of disabling or killing enemies using their biotic abilities. Adepts are the only class capable of summoning Singularity - a deadly biotic trap. When enemies hide behind cover, an adept can use the "Pull" ability and pull them out of cover. Adepts can use the "Push" ability and knock enemies off cliffs and ledges. The Adept is a game class capable of dealing with enemies without firing a single shot.
A typical mage, who is better described as a "superhuman", with all the advantages and disadvantages that come with it.
Infiltrator
Infiltrators are technical and combat specialists, the only class capable of remaining undetected by the enemy. They are deadly at any distance due to their wide range of weapons, equipment, and abilities, allowing them to hit even the most armored and protected enemies. Thanks to their skill in using sniper rifles, Infiltrators can destroy an enemy from a safe distance before entering the fray. In addition, by combining types of ammunition and skillful positioning on the battlefield, Infiltrators can easily deal with both organic and synthetic enemies. When the situation intensifies, Infiltrators can use Tactical Cloak to hide from enemies before returning to the battle in any desired location relative to the remaining enemies.
A mixed class of soldier and engineer, however, unlike the first part, it is so individual that it is quite suitable for fans of assassin-thief tactics.
Vanguard
Vanguards are equipped with L5n implants, providing them with powerful biotic abilities. Combined with their weapons training, this is a deadly combination in close-quarters combat. Vanguards can instantly close the distance to an enemy using their unique Biotic Charge ability. Possessing immense biotic power, Vanguards use Charge to cross any obstacles, collide with the targeted enemy, and send them flying. In addition, Vanguards can unleash an explosive Shockwave, knocking down enemies and knocking them out of cover. If a Vanguard finds himself in a too difficult situation, he can also use Charge to quickly move to a safe place.
A mixed class of soldier and adept, also distinguished by its special individuality. Perhaps its tactics can be compared to those of a berserker.
Sentinel
Sentinels successfully use both technical and biotic abilities on the battlefield. They are always ready for any situation. After overloading an enemy's shield, Sentinels can easily knock the enemy back with their biotic abilities. And if things get too hot, they can use Cryo-Freeze and gain precious seconds to destroy the enemy or find cover.
Sentinels are equipped with the most advanced technical armor. When overloaded, the system releases the accumulated charge and stuns all enemies in the immediate vicinity.
A mixed class of engineer and adept, also possesses high individuality and, as you can see, is extremely armored. To compare it to something specific is difficult; I think it's best to try it yourself.
Let's discuss, ask questions, and choose - discussions are welcome:)