I have never heard of or seen this type. I'd be interested in trying it, but there are so many excellent cultivars at this point I think any new advantage may be best adapting to the local climate.
I have had many mandarins from south america, europe, middle east, africa that were all nice, and also ones that were very poor. I don't see many mandarins for sale (in grocery stores near me) from Florida, though.
Meanwhile, if I can get great tasting mandarins to grow in Pennsylvania, it makes me question the whole idea. Kishu, Dekopan, and Shasta Gold are all consistently excellent for me