Empreinte Montaigne: BB vs MM

Apr 25, 2015
180
51
Italy
Hi everyone! I would like to ask you a question.
Speaking of the beautiful empreinte Montaigne, what are the differences between the bb and the mm size? I mean, I can see 2 main differences:
1. Capacity (the MM is bigger, of course)
2. The lenght of the strap (only the BB can be carried crocrossebody.
Anything else?
Pros and cons of both?
I tried to find a comparison here and on youtube, but I couldn't. And since I don't have either of them, maybe there are differences that I can't see.

If anyone of you has (or had) both the sizes, which one would you recommend?
Thanks in advance