I should likely expand on my statement.
While I have felt several very nice Ruger Six-series triggers, it does take a very knowledgeable pistol smith to tune it...remember that the Six doesn't have a side plate so that you can view how the action parts interact. By comparison the S&W is very DIY friendly. Also, my observation does not extend to the SP-101 or the GP-100, whose triggers I consider, for the most part serviceable...the LCR however has a very nice trigger, better than most of the current offerings from S&W's J-frames.
As luck would have it, the best Ruger Security-Six action I've ever felt, also came out of the Bill Davis Co shop...where this Couger reportedly came from