Being lighter weight means a bigger fighter holding/leaning on you will just tire you out that much faster; it's a big reason why the first fight ended 4 rounds earlier than this one did. Fury just has the ability to eat punches and get up from knockdowns that 99.9% of human beings on earth would be rendered comatose from. At 35 years old there's no magical technical evolution or physical transformation either way that would be feasible for Wilder to make at this point in his career that would've made a real difference.
Understood but didn’t seem like Wilder was effectively taking advantage of his lighter weight to move around more. Fury wears down Wilder by leaning on him and gets mini-rests while doing so. Maybe Wilder would’ve been better off constantly moving, making it harder for Fury to lean on him and using his reach to go for knockouts instead of trying to win rounds.
Seems like Wilder fights to Fury’s strengths.