Funny, for me, the "move " was the limit at my max, not the gear. Back in the day, (never to return...boohoo...) the hardest I ever on-sited was about 12c, both sport and trad. Didn't make a difference. I could either do the move, or not. So in my simple mind, I feel they are the same, sport/trad, is just climbing, with some climbs requiring a rack, and others just draws. Sure you have to fiddle with gear, and be efficient when getting a rest, but unless the ratings are totally sandbagged ( a trad tradition...) all of that is incorporated into the rating of the climb.