What aspect of football besides staying fit more is Ozil better at then, you think?
From what I've seen from Ando, he doesn't lack vision, passing or dribbling compared to Ozil at all. He is stronger and faster than Ozil. Depends on what position you imagine them probably.
If you say Ando is a #10 exactly like Ozil is, which I think Ando is, and he also almost exclusively played in an attacking role in his younger years and before joining us. Considering that, he could've been equally good as Ozil in that role for sure. Ando never really showed it anywhere as a #10, but never got the chance. Ozil was playing at Madrid with Ramos, Pepe, Xabi Alonso and Khedira to support him and had a pretty free attacking role, dream situation for him.
Anderson did get the chance to show his skills playing deeper in midfield, and what he showed there for instance is more than what I'd imagine Ozil would show playing in central midfield. So that's why I would say Anderson definitely has the talent Ozil has. But Ozil has obviously shown more already and Anderson probably never will, makes me a bit sad, although not too much.