I feel that Stylewise, kelly ir more formal, 'proper' and lady-like. IMHO.
although it depends on color/leather too. A fuschia croc kelly might not be as proper as a black togo birkin.
Ahhhh...But if we're to compare a Fuschia Croc Kelly (I agree... ) with a Fuschia Croc Birkin? Then doesn't the Kelly still look more 'proper'?