Well. . Usually you can tell before the dude mounts you. . LOL. . but I can say, that yeah I do notice a difference in a way an intact cock feels with a dude's glans slipping in and out of his foreskin on the inside (It depends on the cock in question of course, and how hard the guy is) but yes. I can feel a smoother slide. With Cut guys sometimes with having the glans exposed all the time the entry is a bit more blunt force.
Honestly besides the factor of the (slide) and friction of an uncut dick. . there really isn't much difference in feel. . because girth and length, are other factors of (feel) for me.
Misterslave