Alpine did that thing first.
The sidepods are not that conventional with that extreme undercut, actually they are a mix between the '22 'floating' Alfa sidepods & the popular ramp-shaped sidepods that Alfa adopted in '23. That bulge is a logical result of this mixture (wide flancs + big undercut underneath).
Alfa already had very aggressive nose-up front wishbones like RB since 2022, (and pushrods at the rear) but now they also have pullrods at the front, like RB? like the last two JK cars too...
So the car/render is an evolution of the last 2 Saubers*, with a big James Key/Mclaren influence in many areas, and RB influence ofcourse, but it's not a simple RB copy/paste.