I am not familiar with "SE" spec term, but each line will have slightly different front details and will limit the interior color choices and combos.
Look at this thread:
http://www.f30post.com/forums/showthread.php?t=612707
There will be a separate M-Sport release in July/Aug with more aggressive appearance. This thread has a tab with M-Sport pictures:
http://www.f30post.com/forums/showthread.php?t=592598