Run a few hundred rounds through the DPMS and it well feel much smoother. The average shooter well not really need a 4150 barrel vs the 4140 the DPMS has, and as does many other brands. The BGC may have a shorter life span, all BCG's wear out and I have seen Colt BGC's fail in the first one hundred rounds.
Go shoot it and don't worry about what the fan boys say. Keep it cleaned and lubed, feed it good ammo with good mags. Maybe buy a spare extractor and spring. It well serve you well.
If you want bragging rights (that's fine) then buy a Noveske or KAC.