I wouldn't mind R3make so much, but I feel like it's wrong to not see "RE#". Even in my thoughts, I abbreviate the names down from "Resident Evil #" to "R E #", and R3make removes that second letter.
Neither. I use REmake3 which I think is the cleanest and easiest way to specify. RE3make and R3make are more difficult to distinguish and the few uses of RE3R I've seen also confused me because i think people are talking about a third Revelations game.