I personally like certain things on the US spec sport line over the US spec M sport. I love the black leather with red stitching which goes great with my Melbourne Red exterior. I like the fog lamps, and the look of the front better on the sport line. I like the black mirror caps, and blacked out chrome exhaust tips on the sport line. The only thing I really like about the M sport over my sport line is the M sport steering wheel and the side moldings.
2013 328xi Melbourne Red Metallic/Black Dakota Leather/Red Highlights Anthracite Wood Trim
Retired:2009 328xi Montego Blue Metallic/Saddle Brown Dakota Leather Aluminum Trim
Retired: 2006 325xi Monaco Blue Metallic/Gray Dakota Leather Dark Burl Walnut Wood Trim
Retired: 2003 325xi Steel Grey Metallic/Black Leather Wood Trim