I have had three guns done by CGW, all three were pro-packages, great work on all three. Yes, each gun they get is going to come out a tad different due to the fact they are all hand done and no gun is exactly the same, they all will have slight tolerances differences that will effect their. All three of mine came out awesome but yes, my 97 is probably the smoothest and shoots the nicest, but even David said it was the nicest 97BD he had ever did, that it just seem to come out more perfect that others he had done, and he couldn't put his finger on why. It is also a heavier gun so it will shoot with lighter recoil due to that compared to the two 9mm's I had done.
Just remember that when comparing your guns with packages they will all not come out the same, yes they should be close in most regards in regards to platform and ammo being used, but none will be exactly the same, and all will require a break in as well and will smooth out even more after more rounds are run through each.