Thanks, but not really. The Youtube poster compares the two verisons of 30 rd. 5.56 mags, not the LR20's, and says they: (1) load easier (I don't have a problem loading the Gen2 LR20's); (2) have a "grippy" texture so he "knows he's holding it" (I'm not doing speed mag changes with the .308, and the Gen2's are "grippy" enough for me); and the floorplates are "different" (I'm OK with the current floorplates on the LR20's).
So, again, is there any real advantage specific to the new Magpul Gen3's in a .308 M&P10 that would cause me to buy one over the current version?