I think it depends on how you comprehend Zoro's RT feats.
I have seen there are 3 points of difference which can create a gap in power level when talking about RT Zoro.
1) Zoro blocked hakai attack a combined attack of 2 yonkos. Many Zoro fans believe he blocked it without adding the context he only did it for 1 second and then needed to be teleported by law. There's a big difference if you think Zoro blocked the attack without the added context.
2) The asura attack which scarred Kaido. Many Zoro fans believe no ACOC was used which obviously change the power dynamics in big way. Imo it was pretty clear from Kaido's words , Zoro did used ACOC.
3) How HP affects AP. There is an assumption that HP somehow affects AP when it comes to Zoro with broken bones but in one piece that is not how it works. Most characters uses stronger attacks when they are very weakened. For example Kaido used his strongest attack in hybrid at the end when he was falling to his knees in death destroyer TB. What is affected is endurance but not AP.
1. The Law teleportation is pure headcanon.
2. Zero ACoC usage. Another headcanon with no basis only assumptions and copium, ACoC usage right after is clearly shown visibly different from no ACoC usage. But we are happy either way because if Zoro unlocked and used ACoC before the MC who had to get hit multiple times by ACoC attacks then this just shows Zoro has more talent and affinity with haki.
3. Mostly nobody cares, you can make argument for both sides because we do have situations from this manga where physical condition and fighting capability are shown to be related. But then we also have people who say named attacks are weaker than unnamed attacks (I dont say it is a blanket rule). So the condition and context always matters.
RT Zoro was clearly above everyone else on the alliance side at that time. He took the most damage, dealt the most damage, played his part in BFR of BM and saved Luffys ass multiple times.
You can call it fan service or extreme outlier peak performance mode or whatever you want to help you sleep at night.