He was a skywalker no doubt, and an all Big East player, and a very exciting player, but a different kind of player than Luis IMO. Not as fluid, didn't have as good a handle and didn't have a very good outside.
Luis hasn't proven to be a good outside shooter, but his form is good and I think he'll develop in to a decent shooter. I see Luis as a 2 or a 3. Where as DR was definitely a 4.
Having said all of this, if Luis develops in to an all big east level player, we'll all be thrilled. Time will tell.