I'd recommend Ross over UCLA for a couple of reasons (no particular order).
MAP vs. AMR: Although these programs are similar in nature, MAP is a full-time ordeal and seems to offer a larger variety of opportunities.
Career Placement: Michigan's career placement is MUCH better than UCLA's. Although it's not specialized as a high-tech school exclusively, the broad general management curriculum draws recruiters from nearly every company that MBAs tend to flock to (Consulting, GM, Banking, CPGs, Tech, etc.)
Culture: The Ross experience is much more collaborative. You're right in assuming that UCLA will offer more of a commuter-like atmosphere.
Hands-on learning: No one does it better than Ross. MAP, the student-led funds, the Tozzi center, business challenges... the list goes on.
West Coast Placement: 20% vs. 80% for UCLA, but I'd submit that's a good thing. UCLA grads seem to be "stuck" in CA (though they probably want to be), but with Ross you'll have alumni spread all over the USA.
Amazon and Microsoft hire way more students from Ross than they do from UCLA. I think if you examine the employment reports with more detail you'll find that Ross is the clear winner.
P.S. I'm really biased
If you haven't already examined our Business School Guides, I think you'll find some helpful information in them.
Michigan (Ross) GuideUCLA (Anderson) Guide