I've shot both versions of the Model 686 fairly extensively and have never found any differences in terms of trigger pulls between the two. I prefer the plus version because, well, it offers an extra shot and I see no downside to having the seventh round (if the "safety lock" is a concern, used 686+ revolvers can be purchased without it). Whether seven shots as opposed to six shots is worth the extra fifty bucks is something the op has to decide; predicated, as Jim Watson suggested, on his intended purpose(s).
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