Jones. But they really weren’t that comparable in size. It wasn’t until later in Jones career that he started hitting weights where Floyd was
Patterson had the fastest hands at heavyweight, whereas Jones was contending for the full version of the title.
If exploding from out of range and leaping into range with a single punch, I'd go with RJJ. In terms of throwing a fluid combination of varied shots whilst already in range, I'd go with Patterson. Either way, both incredibly fast hands for their size.