Unreal Vs Unity 5 for mobile 2d games - is unreal to powerful?

I wouldn’t mind learning both, its just I want to start with the best choice (and possibly not have to learn both) The game(s) I am wanting to start with (I do want to put them in the play store and app store ect) I think would be considered simple(like the ones i mentioned, one input: touching the screen) So i don’t think it is to complicated (relative to other games) a breakdown would be great and I have been looking around threads (I think I have read some of your posts, cool to see you reply haha) to make a choice, but I decided to post so I could get answers i specifically need. Also they both support ads and in app purchases right?