Necropolis or Castle (Which one is stronger?) Auto-translated

In general, even nominally, the stats are roughly equal, and as for how it plays out in "live" games, everything is said in point 7.

There's no question of a tie, because if the 6th-level Humans are only slightly weaker than the Necropolis, then they are clearly superior in the 2nd, 3rd, 4th, and 7th levels.
The 1st and 5th ranks are almost identical.
For fixed and poor random maps (like Ring), Castle definitely has an advantage. By the way, Castle is also considered the strongest on Jebus (I haven't tried it myself).
And on CMs and similar maps, none of the castles has an advantage – it all depends on the layout.

The strongest Tier 7 unit is undoubtedly the Phoenix – they are inexpensive to deploy, and two Archangels will definitely defeat ten of them, and they will bury dragon specters without even trying.

It's kind of ridiculous that they only give 4 Phoenixes per week. I protest against such generosity. Imagine if it was 4 Black Dragons instead, that wouldn't be fair.

In Small Maps, castles with a powerful offensive stack have a clear advantage, such as Dungeon with Shaktar, Necropolis with Galtran, and Fortress with a huge number of Phoenixes, which can be up to 5 on level 121... all others are roughly equal.
On Jebus, levels 6 and 7 are dominant, and here, archers really make the difference, while skeletal dragons are rarely built anywhere, so Necropolis is no longer as strong... although in The Restoration of Erathia, Gosh will beat everyone :D
Poor templates, I haven't played there, so I don't know.

I would say they are equally strong. What can really stand against a horde of Archangels from a castle? Not vampires, not ghost dragons, and not even zombies. You might be surprised, but it's the most ordinary warrior skeletons. Which a necromancer can create practically out of thin air. Legions of skeletons, about 4,000 units + a well-developed hero-mage + haste + (if you're lucky) an artifact that grants +1 to unit health + a player with brains playing as the necromancer = we tear through everyone. Playing as any other faction, I never hoard level 1 units – I throw them in as cannon fodder, distracting from more valuable units. With Necropolis, I can't afford to do that – in this castle, only two things are truly valuable, its highlights: practically indestructible (with skillful use) vampires and hellish necromancy, which allows raising skeletons in large quantities. It would be a sin not to use this, especially when playing against Archangels, for example. So, for example, I tore through about 20 Archangels belonging to a developed hero, cutting them down with skeletons. But, again, I repeat, you need to know tactical techniques, be able to use magic skillfully, in particular resurrection, haste...

Based on my experience playing hot-seat on XL maps, I give preference to Necropolis.

1. Cloak of the Undead King - victory is usually conceded immediately.
2. Skeletons on XL - Mega Power (cannon + Ring of Life = devastation)
3. Vampires and Knights are very good.
4. It's strange that no one mentioned here (or did I miss it?)
the ability to convert Hydras and Dragons into Ghost Dragons.
On my XL maps, I often have no fewer Ghost Dragons than Phoenixes, sometimes even more.
5. In principle, Zombies are sacrificed for Skeletons, and Archangels, Behemoths, Dragons, etc. are taken into the army depending on the situation.

Castle is usually the strongest opponent for the Necro, and a certain percentage of wins is certainly due to them as well. But overall, Necropolis is better.

It all depends on the length of the game. In the early stages, the Knights have the advantage. Objectively, the Knights' units have better stats. The Necromancer wins due to Vampires, Dark Knights, and by raising skeletons in the later stages.

I would give a slight edge to the Necropolis. IMHO, thousands of skeletons are definitely better than ten Archangels.

Cloak of the Undead King is banned by HeroesWorld rules.
LeBron correctly said that everything depends on the template. On SM, Necropolis dominates, while Castle is in the middle of the ranking.
On Jebus Cross, it's important to build 7 dwellings in the first week, so Castle already dominates, while Necropolis is not very good.

And in the griffon's lair, you can almost get angels for free. If a Knight has a couple of such structures nearby, will he crush the Necropolis?

I would vote for Necropolis. Because I like them :D Necromancers really have stronger creatures compared to their counterparts in Castle. Castle can only boast Angels. But only because the dragons of Necropolis are crap. A huge number of skeletons and Death Knights will do the job :p

Who is stronger? No one. They are equal.
Let's start with the creatures:
Skeleton Pikemen
Skeletons have an advantage in numbers over pikemen, even though pikemen are stronger and have more hit points. Usually, by the final battle (around the end of the 2nd or beginning of the 3rd month, although it varies), a self-respecting necromancer will have over 5,000 skeletons in their army (this depends on skill), while there are only about 100-500 pikemen (okay, 500 is an exaggeration). And the skeletons will simply kill them in 1-2 hits.
Zombie Archers
Here, the advantage is clearly with the archers.
Griffins
Here, too, the advantage is on the side of the griffins.
Crusaders
Here, the advantage is on the side of the vampires. Retaliation and regeneration/resurrection are no joke. Although crusaders can put up a decent fight against vampires.
Fanatics
There's nothing to discuss here. As far as I remember, even ordinary liches are stronger than fanatics. And they have an area-of-effect attack.
Cavalry
It's hard to say. Death Knights have better stats and are more powerful, with a 30% chance to inflict a curse and a 20% chance to deal double damage (not much), but they are very expensive. Cavalry has a bonus (charge attack), but it's a one-time bonus (you wouldn't run away and come back after every attack) + they can be upgraded for free in the stables. And yet, I think Death Knights are better, although not by much.
Archangels
Archangels have higher stats than dragons, +1 to morale, and resurrection, but they are more expensive to build (and I don't even consider them the best tier 7 units, they are just very well-balanced in terms of attack, defense, etc.). Dragons have weaker stats, but they can inflict aging, and they are easier to build (although I rarely build them myself).
And also. The castle doesn't have any unnecessary creatures; they are all needed. But when playing as Necropolis, I usually save money on zombies and ghosts and buy vampires, liches, and Death Knights with that money.

I'd like to add my two cents. It's important to consider not just "which castle is stronger," but which army is stronger at the same point in time. And here, if we look at the very beginning of the game, the Castle has an advantage at the start because skeletons and zombies are terrible fighters, and they're also very slow. The Necropolis only starts to "dominate" when liches and vampire lords appear in its army, especially if enough skeletons have been "raised" by that time. Another advantage of the Necropolis is its neutral morale and immunity to mind control spells.
So, the outcome of the war between the Castle and the Necropolis depends primarily on how soon the final battle takes place: the later it is, the harder it is for the Castle.

Well, I don't know. Personally, I only buy zombies when I have extra money, and I leave them in the city. And I don't really use skeletons much (because I don't know how to use them effectively).
In my opinion, if you buy upgraded vampires on the first day and a Castle, and you have enough money (although I think it's impossible to do on day 200...), then on the second day you can buy Cannons and Hives and use only vampires. And then, with Angels, Wyverns, Vampires, and Liches, you can attack the opponent and gather skeletons along the way. I think the opponent won't have time to build Angels (let alone Archangels) on the second day. So, I don't agree that the Castle will win if you play quickly... and I repeat, they are equally matched.

You can also add that the outcome depends on the available artifacts and spells, as well as the player's skill. The more often a Necromancer fights, the faster the skeleton unit grows. But this also depends on the presence of a sufficient number of small neutral creatures nearby and storage facilities.