BP GMT inserts are pretty much the best rep or aftermarket ones you can get for 16710s. Many aftermarket ones have bad looking 2's where the top left curve overhangs the base (called top heavy or hanging 2's).
Two other big tells on most rep or aftermarket Rolex GMT inserts is the double digit number bases are not curved to follow the round insert/bezel curve - most noticeable at 22. And the dots between numerals are both too high and too big.
My gen
It's quite difficult to find a better Pepsi aluminum insert than the BP though, as it is not gen-spec size.
BP: 30.6/37.5
Gen: 30.6/37.65 (+/‐ .05)
there are some really nice aftermarket 1675 inserts but those have a much smaller inner diameter due to the plexi crystal.