The original model SMA8. After that there was (I think) a minor revision that added a smaller version of your reservoir mount, and then the SMA8-A which had a number of changes including (from email):
Yours appears to be the A model.
Remember when they dropped the 1080ti cards and then then 2080ti cards were more money, then they dropped the 3080 and better performance and cost less then the 2080ti. I'm thinking it may be better to wait till 4000 series if you can of course...
Just supply and demand and with the prices being raised recently on the new cards I would think some would just hold off and buy a new card over a used card with near new card prices. Just my thought on it
From what I understand the KF doesn't have the GPU. It's up to you if that's worth it or not, as well as the price.