People that don't have the 2015s are going to swear by the 2011s, 2015s are truer to OG. the 2011s Midsoles were too light in color. Overall the 7s have never known to have the Best Materials. I had the 2002 "Raptors" 7s and there's "really" no difference in quality.
I have both on hand, and the 2011's were undoubtedly crafted with better precision. There's a simple fix to make the 2011's closer to OG's; get the midsoles repainted charcoal.