The Vilna Shas definitely looks the best on the shelf. The Oz VeHadar have some meforshim at the back that the Vilna doesn’t have (although every Mesechta has different meforshim). The Vilna also has some very useful additions, such as “Likutei Avnei Miluim” or “Chidushei Ramban”.
(Actually, the Talman {Kiddushin} has included a remarkable likut of Achronim (such as Mishne Lemelech, Shaar Hamelech, R’ Akiva Eiger shu”t, Minchas Chinuch etc.), which is excellent, but the rest of the print is unclear, and they haven’t got the same range of meforshim.)