I know mate, but we can't make such a comparison for several reasons.
For example, how do we know that ability wise Oddo is better than Sagna ?
Oddo is close to 32 and when he had his best years he was better than Sagna was until now. But we don't know Sagna's real potential and abilities and when he'll be 27 or 28 he can easily be better than Oddo ever was, right ?
That's why i'll go with the current form. And going with current form
Sagna >>>>> Oddo.
You can say Form is temporary while class is permanent, but that goes only for Kaka, Pirlo, Nesta, Seedorf, Gattuso. For players like Jankulovski, Oddo, Kaladze, Ambrosini, Galardino we shouldn't even use the word class in the same sentence with their names.
Most of them are in their 30's and of course that at certain point of their career they were good. But it's a mistake to count the best periods of their career when making a comparison with Arsenal's players.
To sumirize : Forza Arsenal and fuck you Milan