Yes. Roy Jones isn't as fundamental as Beterbiev that's why when his speed left him he was destroyed.
let me guess, you think than "fundamentals" means to have your guard up, right? lol Let me tell you something, boxing is way more complex than that. RJJ's boxing is many many levels above beterbiev's, which is incredibly simple tbh.
they are not in the same league as boxers. only thing beve has over ggg is strength and determination. beve fights everyone like ggg fought brook.
Beterbiev is an accomplished boxer. He had the bad luck of running into Usyk (2011, 2012) and ending on the wrong side of a controversial decision in Beijing (2008).
Beterbiev is more defensively responsible than GGG. He may not move his head a lot, but his guard is always up and never loses concentration. What do you think will happen? That Beterbiev will leave his chin exposed. He comes in with chin tucked and guard up. Once he gets inside and Canelo tries to clinch Beterviev will throw him halfway across the ring.
The reason why people think Beterbiev can beat Canelo is because he's physically so strong and will empowers the smaller man. But Beterbiev is not the youngest and Canelo is in his prime
ggg is a great boxer. elite. beterbiev is not. he is accomplished, as everyone at world level needs to be, but he is very basic in comparison to the elite.
he will get baited, then countered. repeatedly. once you get him to commit to throwing a punch you know exactly where his head is gonna be because it doesnt move. all you need to do is get him to move his gloves by inducing a punch.