Well, we’ll see. My Galaxy has 3 GB of RAM. Everybody will have 64 bit processors.
It’s entirely possible that Apple will have an insurmountable performance lead, but that would be due to software and developer tools (like Swift) rather than just a year’s lead in shifting to 64 bits... IMHO, of course.
Well, the RAM requirements are not the same between the two different platforms. But, in any case, it was doubled (to 2 GB). And the Swift programming language will obviously be tuned to take advantage of the 64-bit processing ... plus the fact that the iOS itself will be tuned to work with the programs in such a way to take advantage of it.
But, as you say ... we’ll see ... :-) ...