Messi is better at creating space with dribbling already, not because he does it all the time, but because he's better at dribbling.
Here's three examples of creating space and attacking the goal at the same time. Now I would like you to show how Iniesta creates as much space as these examples?
A few quick thoughts:
#1 You seem to have no idea what you're on about generally, because you opened with a gif of a fast counter, where Messi simply exposed the fact that Madrid had left enough open space at the back to build a house on. Nothing to do with creating space.
#2 Posting clips of Messi looking doing excellent things hardly cuts it because we're comparing the two best active players. Of course they both look amazing in action.
Thoughtful manipulation of opposition shape with intelligent movement both on and off the ball so that his side is in a stronger position is an area in which Iniesta is pretty clearly stronger than Messi. Messi, very obviously, has less need of his team being in a stronger position than just about any other player ever. I don't think that it'd be fair to call either one a better dribbler for these reasons though, but it's already been established that different things come to our minds when we think about the concept of dribbling.
You do raise a good point about the frequency of touches though, Messi is pretty incredible in that regard and there is something to be said for that. I do think that Iniesta's control is every bit as deft (actually I'd say Iniesta wins that one outright) though, and of course he has a completely different set of strengths in terms of using that control which for me suits a midfield role better and I suspect those are areas in which Messi will never match Iniesta any more than we'll see the reverse happen.