So my good friend has 47's on his '15 RG. I helped him install them, as I have Yaffee's on mine. I'll give you the major difference.
1) Took me 3 hours to file down the welds in the right side to slip the throttle module to go into the bars
2) Took me > 1hr to run the wires, as they kept getting stuck
Had my friends bike wired and on within 2 hours.
Umm, if I had to do over, I'd go 47. And while I do LOVE Yaffe, his ingenuity, drive and personality. Well, I have to speak the truth about the quality.
Oh, one more thing, both sets were Black, both were equal in quality of finish.