Why Gerrard and Iniesta are better than Messi and Ronaldo

All we've been reading about these past few weeks is Messi this, Ronaldo that. The seemingly never ending debate on which player is the best has granted, been a whole load of fun, yet for me it's also been tiresome in equal measure.

There can be no doubt that Lionel Messi won his individual battle with Cristiano Ronaldo in Rome but does that really make him the world's greatest footballer?