The one without the magwell has a fitted Ghost Evo Elite trigger in it with stock springs. The other I think a Ghost connector and lightened springs. Both were running 100% last Friday for 300+ rounds.
No real preference. One without a magwell conceals slightly better. Last reloading practice sessions were all without the magwell but I had to swap back to the Tanfo for AL state USPSA.
Now I'm sure I suck at Glock again. One will be a backup for the other.