IMO the only diffrence is that Generals can have minions. If you want to be a good general it will require more micro than an Assassin.
I think overall Generals offer a little bit deeper game play but at the cost of being more complicated -- examples:
- A general can go and stand at a flag, while his minions go attack a near by tower.
- A general can flee, why his minions attack his would be attacker.
- A general has the option ot purchase idols (which summon more minions).
I personally think they might of had more of a diffrence in beta (with generals being weaker, but made up for it by having minions), but in beta Generals were for the most part underpowered as well. So with those issues made it so I don't think people liked or enjoyed Generals as much.
I think it was a case where the design on paper looked good but after actually implimenting it, it just wasent working as well as they had hoped.
-Jara
PS: I personally think having the split of Assassins and Generals is still a good thing because overall I think it's good to have some demigod who are less micro intenstive and there will always be people who just want to control a single unit.