Is iOS better for gaming or not?

[Dracindo]

I know that not every generation of smartphone is like the ones that came before, but generally speaking, should I keep the operating system in mind when looking for a gaming smartphone? I personally don't think the operating system will matter much, but if iOS would be a slightly better choice (which I actually doubt a bit), then I would consider an Apple smartphone over an Android (given that the price is still reasonable, of course).