For a mobile website, is it better to use a 301 vs. a 302 redirect?

[seohdsupply]

We are vetting a vendor for our mobile website and they are recommending using a 302 redirect with rel=canonical vs. a 301 redirect due to 301 caching issues.  All the research I've done shows that a 301 is by far the better way to go do to proper indexing, which in turn will enhance our page authority.  Thoughts on why a 302 would be a better fit than a 301 on our mobile site?

[smarties954]

I'd stay away from 302 redirections as much as I can, and simply serve a site based on the user agent,

or you may simply offer your clients the choice between the two versions using some kind modal popup.

Here this video might help answer your question.

http://support.dudamobile.com/entries/20308913-does-redirecting-to-a-mobile-site-create-seo-issues

[JadedTLC]

You shouldn't be using a redirect at all for a mobile site. You simply tag the mobile site with rel=canonical and then rel alt the desktop site.

302 redirecting is the biggest mistake ever. Run away from this vendor as fast as you can.