The Super Compact vs. BB2 is more than just the tweeter/horn/driver. The BB2 is a bigger box and it gets more low end extension. It's a noticeable difference at low volumes. I haven't had a chance to push the BB2 at high volume yet. The SC produces plenty of lows, but the BB2 produces more.
The SC is pretty small and portable. The BB2 is a couple of inches deeper and it makes it seem noticeably bigger than the SC. It's not crazy big, but if you stack them next to each other, the BB2 does seem "big" by comparison.
The 210 might be a way to go. It isn't extremely voiced, but it is more traditional sounding and very complimentary. It gets as loud as the Super Compact, according to Alex. It gets more highs than the SC, but nothing crazy high. I had a 110 and loved it. I only sold it to upgrade to the 210 (pending).
If you decide on the SC, there are three in the classis right now (one is mine, two are from map and he has upgraded cloth grilles), and BF might still have the holiday pricing on the new ones. It's a good time to buy a SC