Auto-translated
You won't be able to explain it. There is no difference because :)
Easier - a deliberate simplification, because something complex is beyond one's capabilities. For example, someone playing with pawns does so because they can't win with a king, not because they want to finish the game faster.
Faster - accelerating the game to save time. This is done to play at full strength, but at an earlier stage of the game in order not to prolong it.
Do you understand the difference? If not, then I don't know :confused:
Added 1 minute ago
I doubt you would kill more than 2-3 out of 10+ reds in the situation you described; it's not the same as shooting down hapless pawns with a crossbow and a cart =). So, don't brag too much :)