I read that all three were originally going to be priced at 325 euros. For whatever reason the BIM wound up costing significantly more at 549$. Fingers crossed the BAM and BOUM come in as originally anticipated...
Im just going by the photos and labeled buttons...
Looks like its going to have different reverb algorithms, tap tempo, some kind of gain stage, filters, chorus, presets, midi, stereo in/out, freeze, and maybe/probably other functions too. On the BIM the tap tempo can be assigned to delay time, lfo rate, or both...so maybe the BAM will have some neat trick for the tap tempo too. Freeze is really cool on BIM, it can be momentary or latching with reverse for both modes. I was able to get the BIM at holiday discount, or I might not have grabbed a new one at the retail price.
I absolutely love the Biscuit and think it sounds incredible, i didnt expect to be dissapointed with the BIM and really its surpassed my expectations.