Jones has a better shot against the comeback Robinson of '55 onward... But I think the pre-retirement SRR has too many tools at his disposal Jones still makes a good showing and dazzles SRR in some rounds but I think Robinson's offensive arsenal and his toughness tell the tale
The St. Valentines day SRR has an excellent chance of beating a young, not quite prime Roy at 160. Wouldn't be at all surprised if he won. HOWEVER, I'd probably go with Roy. At the end of the day, Roy was a much bigger man than Robinson and his physical abilities would be very problematic for Robinson.