Dyno Tune = PCM tune.
Trifecta does mail order tunes...which are MEH, alrighttttt...but you aren't getting the full potential out of the car like a custom in car tune.
I'd however rather have an IN-CAR street tune...because a dyno is good for pushing max HP numbers, but you aren't going WOT all the time everywhere...and a street in car tune will help MPG's and driveability as well.