I think it's Douglas. He was ready for a world-class outfight, while Holyfield was probably too slow on his feet, as the fight with Lewis showed three years later (it only got worse). What wasn't a problem against Tyson moving forward was a problem against Lewis staying away and would have been a problem against JBD staying away. jab is the key. I'd rather see Douglas's Tokyo with Holyfield 1991 and I'd probably go with Evander in that case.
Holyfield still wins, but it takes longer to break him. Tokyo Tyson threw one punch at a time and his pace and footwork was much slower than normal. Holyfield threw quick, in combination, maintained a blistering pace, with quick, peppy, in and out footwork. Perfect game plan. He did the opposite of what Tyson did. Douglas was very good against Tyson, but a poor version of Tyson accentuated and helped allow and make Douglas look even better than he would have performed against the superior version. Holy and his team usually knew how to game plan for opponents. He had a plan for Tyson, executed it perfectly, and did and would have done so for Douglas.