Do Your Wedges Have To Match?
I prefer continuity with wedges, a big part of it is confidence and for me it's derived from familiarity. I suppose I could learn to a live with any configuration but I specifically selected wedges in certain lofts and bounces to provide what I feel offers the best playability. I tired to carry a mismatched wedge for a while but the difference in weight was noticeable. I found myself trying to compensate and it was one more thing to think about and that I don't need.
I have done it both ways.
Three seasons ago, I carried an X20 PW, a Cle CG14 50* GW, and a Callaway X.Forged 56* SW (circa 2008). It worked fine.
Last season, I carried an X20 Tour PW, and Cle CG14 in 50, 54 and 58. It worked fine in months when I played a lot.
This season, I dumped the 54 + 58 for a 56* in CG14 (simplify life).
If you have wedges all from the same model, with equal changes in shaft-length increments, it's easier to chart your distances on partial wedges, and avoid distance gaps. This would appeal more to the Pelz-style "programmed" wedge players.