I don't find the skinny uncomfortable but I do prefer the width of a std 3.5, fills the hand better.
Oddly the 3" skinny is has a wider body than a std 3".
My 3.5 skinnies are like guillotines which I'm not a fan of, running PB washers improves the action significantly IMO. Most tri-ways only run well on bearings, my skinnies run better on washers. Makes them buttery smooth w/out the loose guillotine affect, they still drop shut but more hydraulically.