I would go for size/comfort so I'd pick the crossbody model. I actually saw both bags in store a week ago and really liked the color combinations with the monogram canvas. Seems to be a new look LV is upping.
I'm surprised there are no feet on the bag considering it is priced so high. It's so easy to get Louis Vuitton bags dirty as is, but when you drop a couple of thousands you'd expect some feet to protect the bottom.