I just got back from a 1500 mile trip (OR+ID+WA) with a 2012 R mirror,and a 2014 L mirror. I had a chance to compare both under different conditions. I can now say that the 2014 is better for 2 main reasons: less vibration, and less shoulder view. I wish they would have been a tiny bit wider, but overall I like them. I will be ordering a Right one shortly.