Not sure about that benchmark site - it shows a GTX 980 as fasted over a GTX Titan X and GTX 1080 Ti. That doesn’t make sense either. Most likely we’re looking at heavily modded and overclocked cards, potentially some manual optimization of the CUDA code. There are even CPUs in the GPU list. I’d be very careful in making decisions based on this list.
I have a GTX 1060 and GTX 760 in my machine, and a Radeon Pro WX 9100, and on-CPU Intel HD Graphics 630 (but no, I don’t use this last one for Raytraced). Enough to distribute the workload of using Rhino and Raytraced so that it all feels fluent.
Quadro cards are there not only for the Raytracing part (obviously), but will shine in the regular viewport modes for huge models. I don’t have a Quadro myself, but I’m sure @John_Brock and @pascal can praise their own cards.