Prime BM is when she competed w roger and primebeard made the future pirate king and his wings crawl like rats for her treasure, thats all you need to know
English OP readers failing the littmus test on basic visual comprehension set forth by oda for children lmfao
This is something I can agree with to a certain bit.
However, if Big Mom ends up using ACoC this chapter and Ikoku looked visually the same like Old Mom's Ikoku, it would mean that GV Big Mom was AT LEAST comparable to 68yo Big Mom.
On the other hand, I don't really believe Big Mom was still in her prime in her old age when everyone else grew weaker when they were too old. So 48yo Big Mom being her prime self isn't farfetched because she looks bulkier than her GV version but isn't morbidly obese like 68yo Big Mom.
Honestly, I doubt we'll ever see this kind of version, so I don't think it'd even make sense to argue in favor of 48yo Big Mom.