I just played B5 for about an hour and like it a lot. Although I didn't do a direct comparison it's safe to say that I like it better than Crumar's VB2 for Mac and Apple's Vintage B3 simply because I really enjoyed playing B5 and don't enjoy playing the others. Ahh, it's great to have such a fine B3 plug in! The B3 was the weak link in my Mainstage plugins so perhaps I'll now use the Macbook Pro setup more.
I didn't enjoy playing B5 as much as the Mojo's VB3 but to be fair I would need to do a direct compare using the same keybed and amplification. I'll do this compare the next time I have my Mojo rig setup.