Faster results with better single high end GPU or multiple normal GPU`s?

Quick question:

Will a better high-end GPU (e.g. RTX 3090) increase RC performance, or is it bette way to setup a machine with multiple mid-range GPU (e.g. 2x RTX 3070)?

I´m asking because the prices for GPU´s are currently dropping, and i want to fast up my workflows. Sometimes tricky projects force me to do the alignment many times to improve the captured result. So i´m wondering if a better GPU setup might do the trick.

CPU is a…R9 with 5900x

GPU is 3070

Thanks in advance.

Hi mcm1003, one 3090 will be slightly better than two 3070.