I have had my eye on one of the Avatar B412 cabs for a while. The Dually cabs are sweet but I have nowhere to build one.
I've heard the b412 is not as efficient and as low end heavy, plus less headroom, due to the small size of the cab. I think it's only 14" deep small vented down in the corner. He just modifies his guitar cabs for those. The 212 is more of a traditional bass standard 212, deeper and tuned lower. It has a crazy amount of low end. More than I would want to use. I definitely dial the bass back a bit when I play one. But they sound sweet.