Yeah, both. This might sound silly, but choosing between these two fine men is unjust. Would Xavi be Xavi without Iniesta? Would Iniesta be Iniesta without Xavi? Would Barca or Spain win it all with just one of them? Hell, just watch this:
And that's why FIFA should make an exception this year, and give the award to both of them. Like a joint award. Just say the managers poll was tied or something. I mean they're FIFA, and based on what we saw and heard about the World Cup 2018/2022 selection process, pretty much everything is possible in football's headquarters! This time though, I'm sure the world will understand.