They had a really good vid on the Mustang vs the M3. In the end; the M3 beat out the Mustang on their lap time by a 10th of a sec. Anyway; good vid if you care to watch:
YouTube - Super Coupes Track Attack! - 2011 Ford Mustang GT vs 2011 BMW M3 Coupe
On a side note; I think most people would consider trading in their ride for a nice M3 even though BMW hasn't put out an interesting/good looking interior in years (granted that is just my op - one of the main reasons why I chose my G35 over a BMW to begin with) so I have to wonder about the whole 'bashing of American cars based off of interior alone'