I think Smith would batter him, 175 is a lot easier for him than 168 post WBSS, don't judge him on the Alvarez and Ryder fights.
It will also reflect the huge gulf between Yarde and Smith, not even mentioning Buatsi who seems to avoid fighting at every opportunity.
Pretty much as every other person on here sees it. Arthur is far from World Level....Smith is proven and would end Arthur inside 4.
A poor fight for Callum, he needs a much bigger challenge in my view, especially since he is new to the weight and will look to fight for another world title after it. Lyndon realized he got lucky and caught Yarde when he was at a real low (father and grandmother died, problems with Tunde etc) so managed to somehow get a decision win by jabbing for 12 rounds. It was very noticeable that in the 11 and 12 rounds when Yarde finally got going he nearly stopped him with just 1-2 decent shots. That's why he refused the re-match initially and Frank Warren had to use legal letters and the threat of suing him for a lot of money for not fulfilling his contract to even get the second fight to happen. Arthur tried everything to get out of it! We now know why as when Yarde had a proper camp behind him and was focused he walked trough him with ease. Callum knocks him out in 5-6 rounds no problem...