Man, does it even matter?
Rayleigh and Scopper still rocks
Zoro and Sanji still rocks
who gives a fuck, all 4 characters are great in their own rights (Scopper needs more screentime though before saying that to be fair hahaha). But, they do not need to be an exact mirror of Zoro and Sanji. They only need to resemble Zoro and Sanji in that they are Roger's best two fighters (before Oden joining for one single year as a borrow LOL)