There are two of us gearheads in Vancouver BC who were lucky enough to score the last two Baby Baby Blue amps to be shipped to Canada. I have drooled over the BBB for a couple of years, having rented one for a small gig once.
The new version of the Baby Baby Blue, The Spellbinder Blue, uses the same amp and speaker setup, but the internal impedance has been cut in half to obtain the 160-watt output from the head. In the BBB, which runs at 8 ohms internally, you connect an external 8-ohm cab to get the 160 watts.
Another major difference is the weight. My recently discontinued BBB is 39 pounds, and the Spellbinder cuts it to 27 pounds. I see they advertise Italian Poplar as the cabinet material, same as my ultra-boutique Epifani 112's. The difference in weight may make up for the absence of one of the more important features of the Baby Baby Blue--the external speaker jack.
By itself, the BBB has always struggled in a live music setting where there is a live drummer and a few guitars. I have used my BBB in small clubs and outdoor garden parties, and it more or less fills the bill. But as soon as you need more poop, the clipping lights start to flash--both input and output--and that is the end of the volume road. The situation changes dramatically if you add a small external cab, either 10, 12, or 15". This is no surprise as we know that volume mostly comes from the number of speakers more than the number of watts. Add an external speaker to the BBB and all of sudden you have everyone's attention.
The new Spellbinder gives up the external speaker jack, and I think that is unfortunate. As for the weight change, I don't mind humping the extra 12 pounds knowing that if I need to boost my stage volume, I just add a single 12" cab. I think the Spellbinder is in tough with the competition from MarkBass and other small format bass combo's.