Several years ago I did a lot of research on clovers, Durana and Patriot seemed to always be at or near the top of each study.
We did some test plots a few years ago with Durana, Patriot and Whitetail clovers side by side
Durana was by far the best producer and was the most drought tolerant, Patriot was 2nd and Whitetail was a way distant 3rd, not even in the same class as the first 2.
Hope this helps.