I don't have one of the models you're looking for, but have the 4" 627 Pro--which differs in that it has the slab-side barrel profile, is cut for moonclips, and has an interchangeable (as opposed to pinned) front sight. Of four N-frames I've owned it is my favorite. It is extremely accurate and the trigger smoothed up very readily with use and a small amount of tinkering. Great gun and great value.
I did handle both the PRO and the base model before purchasing and decided that, for me, the upgrades mentioned above were worth the relatively small bump in price. I still feel that way.
