Nitpicking
U grooves and square ares till legal. They just can not exceed a certain “volume”,
So in effect they are smaller or further apart
While tour pros have in effect had to play the new grooves,they also have access to brand new wedges (and grooves/faces) as often as they like.
Used to be many held on to favorite old wedges forever, now many put new grooves in play quite often.
I had two nearly identical 56 and 60 degree wedges. Practiced with one 90 percent of the time, had the less used one handy with fresher grooves when needed. To me, a low spin guy, it helped.......at least mentally!
The comparison test in this was similar to what I’ve experienced on my own. The biggest difference being the longer/lighter new club, and how much harder I had to work to get the new ball in the air with my old persimmons.
My unscientific experience was surprisingly little difference in distance with new stuff vs old ball/ new club. Usually within ten yards.
When I worked out getting the new ball in the air (usually a slight fade too) it was again not a staggering difference. Hitting an old ball with a persimmon, it got in the air easier, and did not roll nearly as much after landing, but again, the difference was t staggering for me vs new ball......maybe 8-10.
The balls were Maxfli HT fwiw. We’re still in box, but stored in my garage, and basically there since mid 1990’s I was shocked at how they still flew decently.