I looked hard at both and went w 686 & my bud bought a GP100 both w 6" barrels. We shot them together and accuracy was approx the same but the trigger on SW was noticeably better. SW just looks sexier while the Ruger is kinda boxy. Yet, there is no doubt the Ruger design is built stronger.
You can't go wrong w either one. Handle both and whichever gives you a warm fuzzy - buy it. Nothing wrong w Ruger trigger that a good gunsmith can't fix. SW - buy older model w no Hillary hole. Case hardened - Target hammer n trigger is a plus !
Note: SW - K frame, L frame, N frame - pick the size, weight, balance that suits you - 6, 7, 8 shot. Ruger - also has SP101 5 shot or GP 100 6 shot.
Ruger has a Wiley Clapp - TALO - edition that looks sweet.