I know there are quite a few Unity games out there in the market. I had ruled out Unreal and kinda settled on using Unity for my tinkering with games, because of the pricing differences...but now that Unity is so much more expensive at $1500+$1500 for each platform you want to support (if you don't want a Unity splash screen and the limits of the free version), and Unreal being effectively free forever for me (since I sincerely doubt any of my tinkering will result in a game that makes $3000+ a quarter, ever), I'm leaning toward giving Unreal more of my attention. But, I primarily want to develop for mobile, so having an effective mobile deployment process with the engine is kinda mandatory.