My response on this subject is based on my experience using both options (a different gap wedge vs a set-matched gap wedge).
I used to have a three-wedge Callaway Jaws set of 52 (bent to 51), 58, 64 and also a set of 52 (51), 56, 60. I have always liked wedges with aggressive grooves (Jaws are great for that) but I found that I was often hitting the 52 at 95-100% and the spin was difficult to control (sometimes biting on the spot and other times pulling back 5-10 feet) and it was destroying golf balls where I’d have shred marks on the ball every time I hit one full.
As a result I went back to my set-matched 50* Gap Wedge as the spin was more predictable (stop on the spot or pop forward a yard or two) which is fine on full shots. I use that GW now exclusively with two Jaws wedges at 56 & 60 and overall have improved results in wedge play.
My Sub 70 Black TA3’s just came this past week and I ordered the AW 50* as part of the set to keep the same type of set-up.
I should mention that my decision to play the set matched Gap wedge is because I typically hit it full (most of the time) so matching the feel and spin response of the rest of the iron set made sense to me. With the SW/LW, it’s very different and I probably only hit them full-out about 25-35% of the time as I’m often between clubs or at a less than full shot yardage (ex. being 30-50 yards off a par 5 in two) so having something that I can spin/stop to tight pins and or recover in short sided situations is what I need.