When I fish for large mouth and fishing soft pastics I usually dont use scent because the lures I use are already scented. Try using scent on a lure and none on the other and see what the catch rate is. I do use scent on most shad body lures I use wiper fishing, now in the spring that is a fish to me is not that picky I will take cooking oil and mix garlic with it and spray the lures with that. Smallmouth fishing if I use a scent it will be a crawl scent. And largemouth fishing if I use a scent it typically is Shad or Crawl sent.