Ruger is better!
One could say I am biased. I am! After owning a 629 .44 and a 686 .357Smitty, I shot a Ruger and SOLD my Smiths. Why:
1) Ruger Grips are better! I shot heavy loads. The Smith comes with a very nice hogue grip, however, neither of these guns had factory grips that covered the backstrap. All I can say is ouch! I tried Pachmyer grips that did cover the backstrap. The grip became too large for my small hands. The Ruger factory grip and the Hogue after market fit my hands on the Ruger PERFECTLY!
2) Ruger handles heavier loads and does not go out of timing. Both .357 and my .44 Smith locked up on hotter loads. My 686 (both a 6 and 7 shot) had the timing go out on them. Each spent time in the shop for repairs. My Rugers (GP100, Super Redhawk and SP101) have never seen timing problems or the shop after many years and several thousands of rounds.
3) The trigger issue is minimal. Smitty advocates claim the trigger is better out of the box. It is, but is is marginal. My newest GP100 has barely a noticable difference than my former Smiths. I have noticed the more I break in the GP100 trigger, the closer it gets to the Smith. Ruger is working to make less overtravel, burring and creep on their GP100 triggers. They are suceeding. Don't waste your money on a gunsmith for a trigger job on a GP!
4) The GP100 is a stronger, more formidable gun. Ruger still continues to build
the GP from a solid block of steel. The Smith still has sidewalls and sideplates that will bulge with heaveir loads over time. On the range, I have seen two 686's blow up. One was because someone (my dad) handloaded inappropriately. Interestingly, I was using his same reloads in my GP100. NOTHING HAPPENED! His Smith, nothing but shrapnel. He's is very lucky that all he suffered were some powder burns on his arms.
5) Fit and Finish are basically the same. Smiths tend to be a bit brighter, but the fit on a Ruger is perfect. Not much difference at all.
6) Accuracy is the same. I have shot both for years. The Ruger is just as accurate as the Smith, maybe better. Some Smitty advocates say the 686 is just a "tad" more accurate. I call B.S.! My out of the box Ruger shoots as well or better than my dad's replacement 686 (that he blew) and the 686+ that had a $150 dollar trigger job. In case you think it is just me, he shoots my Ruger as well or better than his Smiths. In my personal opinion, the Ruger actually has better balance (Full underlug 4")
7) RUGERS COST LESS! If you want to spend anywhere from $80-$150 more, be my guest and purchase the Smith. I think you are getting a better, stronger product from Ruger that costs less money.
8) Avoid the %^&$ locks! Those new Smiths' and the "integral locks" I hate em. Never will I own a gun with one. It only adds to the cost and the possibility of repairs. I hope Ruger is learning thier lesson with this and the semi-auto .45 p345. That gun has been a nightmare with a safety disconnect and lock. Keep it simple. Six shots and no locks! Seven and eight shot Smitty revolvers, more chances for timing problems. When you add the locks...you're just asking for trouble eventually!
Good Luck in your choice...but buy the RUGER!
Porter.