I love them both -- plus N Frame 27s, 28s and 627s -- but if I were compelled to own only one it would be my 30+ year old, P&R'ed 27-2 . . . and if I were forced to chose between the 686/681/581/586 and the GP100, I would opt for the Ruger, since you can always develop (use plus Wolfe) the s-m-o-o-t-h trigger, but not the extra strength.