The combat stocks in your image are aftermarket (Altamont?) products.
The $$$$ combats are the original S&W made goncalo alves wood ones.
I've tried all sorts of grips and settled on the new S&W 629 ones an the best fit for my hands.
Cannot shoot with the Hogue product, its just wrong for my hands.
625s are great competition revolvers and many have seen lots of use.
Not necessarily a bad thing as these are really tough revolvers.
Mine sure have.
You should, of course, do the usual due diligence revolver checks before buying.