Twice and BP debuted at a time which is radically different for GGs and Kpop in general. Physicals were different, K-pop’s global and western popularity was different. Heck even Korean charting is different now then when BP and Twice debuted.
It is almost impossible to compare to groups now as the scene is so different. NJs had the benefit of debuting at time when Kpop is at its peak in popularity. Twice and BP debuted before that and rode the wave of thats success and was partly responsible for that growth behind BTS, EXO and other groups.
NJs is undeniably great and will probably accomplish even more things. They will sell well, chart well, and I think your very well. They will have a legacy when they are finished which will be hard to top. But comparing them to groups which had to develop their own international fanbase from the base that was a lot smaller than NJs is weird as hell.