If your headshape sucks nw4 is prefferable imo but other than that yeahAs someone wise once said: "Being bald is better than balding".
If you have gone beyond norwood 3, I see really no reason or benefits at all in keeping your hair. Just shave the damned thing and you'll look x10 better and younger.
Over for patheti cellsIf you can make a NW4 look like a NW3 that's a no brainer but making a 5 look like a 4 looks pathetic.