I'm not sure, but I found this site that does comparison reviews. You can select Bernina 350 and Bernina 380 to compare. (Looks like there is also a Bernina B 380.)
http://sewing-machine.diplo-best.com.../BERNINA%20350
I didn't get the comparison to work, but the link above is to the reviews on the 350. The link below is to the reviews on the 380:
http://sewing-machine.diplo-best.com.../BERNINA%20380
Also found these threads:
http://www.thequiltshow.com/bb3/view...hp?f=54&t=3792
http://artisanssquare.com/sg/index.php?topic=12559.0