It could well be very close and a disputed decision with Marvin scoring with more of the cleaner, harder shots, but Calazghe taking more rounds on workrate and edge in speed. Joe by split decision.
As far as forums these days go...calzaghe now joins Eubank snr as some one who really never beat anyone remotely elite at their best but is now in ray robinson territory online in mythical matchups... Calzaghe did nothing special for the first 11 years of his career...but evidently a barnstorming win over davey moore mk 2 Lacey....a glorified European champ and a shot to pieces Jones Jnr...are behind all this. Ps: I had him losing to Hopkins.