Demigod is like more like aeons of strife / rival nations (rival nations was one of the best War3 mods that was around the same time as dota, the heroes had their default skills so it was pretty balanced) than dota.
In dota, you can't upgrade your troops, but in Demigod, you can. In demigod, some of the heros can have a lot of summons and minions, which is quite unlike dota. even though some heroes do have summons, theyre nowhere as many.