I have a UV-5R and UV-5R+. No difference at all in how they work, and because of the faceplate, the Plus one is heavier. I actually prefer the regular Uv-5R over the Plus because of the weight. Great little HT's for the money though.
BTW, there are some BF F8+ units out there that seem to be just the same as the UV-5R. The only difference I could see was that they eliminated the band switch on the front upper right panel. I programmed one for a buddy of mine, and it had the same BF297 firmware as mine.
73,
RT307