The Mini's recycle time is a bit slower, and magnified when you have multiple units attached to it. The Mini also stores less power, so you get less pops power charge. That said, the Mini's battery is easier to keep maintained, and it's smaller/lighter. Personally, I like the capacity and recycle time of the VBII. Also, the weight is fantastic for anchoring a lightstand (which is actually a huge benefit for me).