Although Floyd generally likes to stand in front of his opponents and make them miss a lot (which would not bode well with Trinidad), i think in this matchup he would have the presence of mind to use a lot of foot movement, exploiting Trinidad's stationary footwork. I would lean towards Floyd on points.
Trinidad always had problems with boxers that use their foot work well in this case Floyd has the ultimate advantage. However, Tito knew how to cut the ring and at 147 he had great condition... If Floyd got in front of him to make him miss and Tito somehow manage to put Floyd against the ropes as Floyd sometimes tends to do... There goes little Floyd's head and ribs to the stands... Tito by KO in a late stopage by Tito's left hook to the jaw and body.
Only difference is those men were just as big or bigger than Tito....Floyd won't be able to discourage Tito from coming at him...Tito UD..