I like both, but there something that I like about Halo Wars 1 graphics more than Halo Wars 2. I guess its just the art style that makes a huge difference. I still prefer the original games art style, I feel like they could expanded upon the original art style and sticking to something that we are used to seeing already.
I would view that one of the main advantages with the Halo Wars (1) graphics is that they are simple which in turn makes the game simple. One of the most essential aspects with a RTS game is to keep it simple as you don't want to dedicate an unnecessary amount of time analysing the battlefield with a magnifying glass in order to get a basic picture, it's something that should come instantly.
My only complaint with the Halo Wars 1 graphics is that it's difficult to differentiate between a level 1 and level 2 Warehouse when the base has an active energy shield.
