Is anyone getting better viewport and rendering power with an eGPU on a Mac?

Is anyone getting better viewport and rendering power with an eGPU on a Mac?

My late 2017 27" iMac with 32Gb RAM is enough for me to produce illustration and game assets but I see the viewport slow down with big scenes in Eevee and the system with big renders.

So I am thinking of getting eGPU with an Radeon W series card or a Vega?