I love them both, but I slightly prefer the 686+ 4" to the 6", only because the 4" seems better balanced to me, if that helps you at all. I have a number of wheelguns already and a couple more on my Christmas list. I agree with others on these forums that there is no vaccine available for the "Wheelgun bug". You, like me, are permanently infected. Sorry to be the bearer of "bad" news. Enjoy!