The only biologically supported difference is moisture, and the happenstance of the loss of said moisture. Unless the foreskin is excessive there should be no difference aside from the penis head ( if, again, excessive ) on a "cut" cock or the speed in which moisture leaves the vagina.

The glide mechanism, a major proponent, does not provide more "friction"; it's function is actually to provide less friction to prevent the vaginal lubrication from drying out.