Did you see less motor power consumption on the .dat files when comparing new to old?
I simply compared flight logs from same day, same battery, same props. Consistently 4000+ feet less total distance and 2 minutes less flight time. I get max 52-53K on older build and 56-58K on the newer one. Have many flights and I always fly right down to near 3.4V. The day I crashed with over 58K distance I had a strong headwind on the return leg, over 7mph and still got 23 minutes flight time. The old build has no chance to come close to that. Keep in mind that these are unmodified, full stock weight.