The uca 220 is technically the same as the uca 202. The only difference is the colour of the case and some software.
Anyone who wants to do a listening test should realize that the uca 202 has a quite low ouput of 1.2V, compared to many DACs that comply with the cd red book standard of 2.0V (or more). A low output level is not a bad idea, given the high input sensitivity of many amplifiers, but in a direct comparison it will not be as loud. Since the brain interprets louder as better, the differential should be compensated (and very precisely) for the comparison to be meaningful.
I do want to repeat that I would never claim that this modest unit is as good as e.g. a Benchmark. It is, however, remarkably good for the price, much better than any laptop sound card, and excellent to upgrade a secundary system composed of legacy gear.