sorry didnt see.
well yea thats just my opinion. zoro is very much suited to be top tier cuz hes the most hardworking man in one piece in terms of getting stronger. since day 1 hes been working his ass off. and his goal is to be the strongest. and hes got that killer demon instinct in him, thats it.
We don't know whether Sabo is hard working or not. He should be since he is part of the Rev ARMY XD. But I think that on paper Sabo has more reasons to be able to reach top tier (Luffy's brother as opposed to Luffy's friend, trained by Dragon as opposed to trained by Mihawk) though ofc (almost certainly) both will/are gonna be top tier
ace was always stronger so stop making sabo his equal
zoro and luffy are 51 to 49 either way luffy was determination but zoro is stronger
sabo vs zoro is unknown because of adult sabo we have no feats
I think Luffy and Zoro are about 100:95
If I remeber correctly Sabo had 49 wins to Ace's 51 wins so as opposed to your claim of Luffy:Zoro (which is non-canon) Ace's:Sabo's 51:49 was
actually canon (unless my memory is tricking me, in that case I apologize in advance)