1) I spent a lot of time trying to figure out how the UCA-222 differs, if at all, from the slightly cheaper UCA-202 (Behringer U Control UCA202 USB Audio Interface
). I finally concluded that the only differences are the name (202 vs 222), the color (222 is sports car red), and the software included. The units are otherwise identical. This is useful to know, since I've read people on other forums wondering this too. Behringer seems to go to lengths not to say this in so many words. I have a theory why (just a theory) and it involves the other main difference, the software that comes with the 222. Now more on that:
2) The 202 comes with the free and open source Audacity, and with Kreatives' Kristal Audio Engine (also free)--(neither one is the best free choice out there). The 222, on the other hand, also comes with Energy XT2.5 ("Compact Behringer Edition") and another disk with "over 100 virtual instruments plus more than 50 effects plug-ins including VST host-, audio- and podcast-software for direct start-up." For me, the question became, is the 222 worth $6 more to get this software?