aaahhhh! this is bringing back painful memories! logic games were the worst section of the lsats. for me anyway. bleh.Studying for the LSAT so I'm going to diagram this like a logic game:
If you want to be able to carry it comfortably on your shoulder, then Blake.
If you like multiple compartments or organization in your bag, then Blake.
If you want a more traditionally elegant look (and don't mind hand/arm bags), then Venetia.
If you like your bags to have one big roomy space, then Venetia.
They're both great bags. If you have any stores near you that carry MJ, I do recommend going and playing with a Venetia IRL. You may wind up feeling strongly either way about it.