Tsyzu was very good at pressuring and cutting off the ring. He would beat Camacho easily in my opinion.
The Hector Camacho who fought at 140 lbs. in 1988-1992 would be decisioned by a prime Kostya. However prime Camacho was better than Kostya, in my opinion. Pre-Rosario Camacho (1985-1986), if he moved up to 140 llbs. to fight prime Kostya would out slick him and win a decision. He'd only have to move up one division from lightweight.