I also had a 627 PC, and I was very pleased with that gun. The one you're considering is also IDPA legal which the PC 627 isn't with it's 5" barrel which also accounts for the weight difference.
Below are a couple of 627 PC review links, and some comments I made on another thread for whatever they're worth. I will say the second rose-wood grip that comes standard with the PC version was by far my favorite.
I competed successfully with the 627 in IDPA with full moon clips in Anniston, AL loading .38 (the full moon clips don't work as well with .357 and I'd recomend a speedloader for the longer heavier .357). My competition was was unofficial because the 5" barrel exceeds the maximum IDPA allowable, and I didn't follow the 6 shot maximum for revolvers. I was just working on proficiency. People loved to look at and shoot that revolver.
The trigger action was pretty good as delivered, but I had it tuned some more. Very intimidating gun compared to the Glock 22 my agency requires, but I never used it in an LE context.
Finally, I found Jerry Miceluk's (spelling) instructional DVD indispensable for firing a wheel gun fast.
A very positive review of PC 627 revolver is at:
Smith & Wesson Model 627-5 and another that is critical of the weapon for IPSC speed gun competition but otherwise favorable is at December, 97 IPSC.