Not really, a 3090 GPU does not give you a significant advantage over 3070 or a 3060 for rendering times. A GPU render takes so little time to make that 10% advantage means like 12 or 13 seconds difference.
The big advantage of a 3090 is its monstrous VRAM pool that enables some very complex scenes. If it where CPU renders (20+ minutes) I would agree but GPU renders take a few minutes (2+ minutes). If you want to check a dev that goes into detail check
[VN] - [Ren'Py] Artemis [Ch. 1] [digi.B] | F95zone. This dude is pushing ≈3000 renders for a 4 month cycle update rendering on multiple PCs.