I looked around and didn't find any real-world comparisons of these GPU's for SuperFly renders in Poser12, so I thought I'd put this out there for those curious about it. Whether the results are worth the expense is up to you to decide.

Before migrating to he 3090ti I did a simple benchmark using a stopwatch. I loaded my scene file consisting of 3 characters(M4/V4/M4)  6 clothing figures,  3 strand hair figures(with dynamics) and multiple dynamic clothing items.. The scene also includes an entire neighborhood of houses(34 simple houses and 5 detailed houses fully furnished) 19 high polly trees and 5 vehicles also high polly. Real geometry folks, I'm not rendering over a simple photo background. I'm not sure how many polygons that adds up to but V-ram(task manager) indicates 6.7gb utilized. I loaded the Ultra Adaptive GPU preset and switched to the Optix rendeerer. I also used NR on all tests which adds a couple of seconds to the mix. Your mileage may vary.

Here are my SuperFly results:

RTX 3060(12gb) ::: 00:15:48

RTX 3090ti(24gb)::: 00:03:20

RTX 3090ti without Optix::: 00:06:26...(if that's not an argument for using Optix I don't know what is.)

Conclusion, in my case the 3090ti renders roughly 4.74 times faster than the 3060.

Other info:

AMD R9-5950X

64gb DDR4 3600

2 gen4 M.2(1+2tb) + 6Tb HDD+ another 6tb external HDD for backup.

PSU is 850w gold.

Hope someone finds this helpful.

Y'all have a great day.