Sibbo the better schooled fighter and with the power to keep Nigel honest. Could develop into a scrap though as falls more and more behind. nigel too much an open target though and tastes the canvas at least once. Sibbo most likely takes it on points.
Tough one this as I loved watching both in their prime but I would have to say if Sibbo could get through the first 5 rounds, he'd take it by stoppage around the 8th or 9th.