[hesdeadjim]

Frankly any comparison is going to be superficial unless the comparison is done by a person who has actually shipped a non-trivial game on both engines.

So many of the problems you run into making a game on Unity, Unreal, etc come down to the out-of-the-ordinary requirements of your game and the inevitable peculiarities of the engine itself. Part of becoming an "expert" in building games on a third party engine is knowing where the pain points lie, where you should absolutely not fight The Way It's Done, and what bugs remain unfixed for years on end (Unity asset bundle system, looking at you).

Edit: My point being that unless you know the needs of your particular game and have familiarity with a candidate engine, it will be very difficult to determine if your choice is "best" or not.

[Pica_soO]

Reminds me of all the "Lets make a battlezone like shooter"-gamedevs who dropped by on the Spring-Engines dev site. And yes, you are perfectly capable to do that. And no, it wont work well- for the reason, a RTS-Engin has a built in lower physical Simulationframe update- and is allowed to act "slower" to commands then a shooter. So, if you want that shooter to happen- engine rewrite it is.

[vvanders]

As someone who's been through the pain of making UE3 fit for a game it wasn't built for that's one the best nuanced answers I've seen on the subject.