Norris for me. When on song Terry was great to watch. Fast, skilled, aggressive very formidable. He had plenty of elite fighter attributes but with a couple of glaring flaws (chin, temperament, ring IQ). Spence was a good world class fighter but never struck me as having any really elite qualities. His workrate was good but I've seen better. He wasn't overly fast, could be hit, had good but not devastating power and had skills but well below Norris imo. Errol was tough and brave and they're both pretty great things for any fighter to possess. Picking Norris if he fights to his ability by a clear UD or late stoppage. If he replaces his brain with a pumpkin on fight night as Terry was wont to do then I could see Spence getting a stoppage himself or a DQ victory thats completely Norris's own fault.