RJJ right now i guess, but i reckon that should things go right for mayweather he will be the one remembered. I feel that when making this decision it is very difficult to be objective. Roy was popular, Roy was a crowd pleaser and Roy was aggresive. Theses factors make himthe very antithesis of Mayweather. Mayweather is not all that popular, he boxers to win for himself not the crowd and he is not aggresive he neutralises his opponents aggression.

This makes it incredibly easy for us as fans to say that Roy was greater. He accomodated our needs and desires by fighting with an intriguing style in a way which excited us. He said the things we wanted to hear and we believed every word. He accomodated us the fans.

Mayweather as i have already stated is the anti-Jones. To use a Shakesperian line "Hyperion to a satyr." He fights using that scientific style which allows him to win convincingly without ever engaging in any dangerous exchanges or flurries. He kills the action in the Ring by negating his opponents work. Outside of the Ring he makes it quite clear he does this for himself. Mayweather accomodates Mayweather.

But consider this. Mayweather accomodating his own needs, may well be the factor that determines his legacy. As he has never been an all action fighter he longevity is less likely to be affected. He can go on another 5 years if he wants as his style allows him too. In fact it is constantly improving as the more expierience he gains the better he becomes. Compare Roy Jones' and Mayweathers careers. As Bilbo stated, they both have the ability to look magnificent when opposed by fighters who appear a class below them. However there is a large difference. Jones worked them over and Knocke them out. Mayweather dominated them for every single second of every round. He boxed their respective ears of....And thats every fight without exception.

In addition, i feel that Mayweather has indeed face the better opposition or at least performed better aginst their parallell opponents.
I mean Roy did some great things to some great fighters....B-Hop and Toney need i say more! But Strangely enough they were two fighters that Took Roy the distance, his greatest feats at middleweight his second weight division (he started at Lm).
And....strangely enough Mayweather stopped one of his best opponents, at his second weight...What he did to Corrales was jaw dropping. (I have rated Corales over Castillo here and im sure il have a knife to my throat later for saying it!)

So don't be so swift to say Roy, he was great no doubt, but i think that Mayweather is building the greater Castle of Memories and will have the larger Jacuzzi in his HoF penthouse.