I will give you a very accurate comparison that you can even use to predict future events
Crocodile and Doflamingo comparison is obvious
Big Mom is both Enel and Moria, she's delusional and want to force her view on how the world should be just like Enel , and both are portrayed as villains who know everything and see everything, basically they're the same type of villains, while the similarly with Moria are obvious ,her sweet commanders are like Enel priests, with Cracker fight resembling Sasori
Kaido is Lucci, with Zoro being the Robin of this arc and Yamato being Franky
Dragon is WB of the new World in term of role at least
Oda did some good changes to not make it obvious, but we can say the new world versions are the original ideas, and pre ts villains are the ideas being simplified to extend the length of the series, except for Crocodile