LOL. I don't! A properly fretted note is a properly fretted note. End of story. Now, how hard you pick, the angle of your pick, the shape and material of your pick, where you pick on the string... those all affect tone, but that is stretching it to call that "fingers"... that's the pick, and picking.
Phrasing, style, etc., etc., is in the fingers (and brain) but tone is not. Any average player can get the tone of any other player by doing those things above the same as the other guy. The issue with this debate is the "sounds like" thing. The old "if Ted Nugent picks up Eddie Van Halens guitar, he sounds just like Ted Nugent, not like Eddie" thing, is people confusing "tone" with style. Ted still plays like Ted and thus SOUNDS like Ted. But the rigs tone is all Eddies. And people trying to tie these two things together as one thing, which is is NOT!