If they're different, which one is better for washing the car?

my opinion they work the same. it just depends on the quality of the mitt. i preferable stay away from walmart, kmart, target because there all the same but with different names. i know meguires has a nice line of wash/dry mf's and you can normally get it at a local parts store. NAPA has them around here and every other little car parts store. autopia sells a great MF washing/drying products. i also love zymols sponges.

I tried an MF mitt from Target before and didn't like the sudsing action. The sheepskin ones seem to be much better in that respect. Alas, mine is from AAP, not a Meguiar's one. Gonna check out NAPA. Thanks.