It's a cross between Nova and Lee.
I find it tastes very noticeably better than Nova.
Nova itself is a Clementine x Orlando tangelo cross, and so is Lee.
I tried Nova and didn't think anything special of it. And I believe I tried Lee. The flavor was like a good Dancy and there were some tropical mandarin aromas in there (not really my thing though) but it was very seedy, and so overall not worth it.
This latest cross appears to be an improvement over both of them.
Also because both the parents have Orlando tangelo in their ancestry, it wouldn't be that surprising if they had some degree of cold hardiness.
(Orlando is slightly cold hardier than Minneola, though does not have as good flavor, and they are both siblings resulting from the same cross)