In my climate, I rank things as follows:
Fruit quality:
1.) Honey Jar and Sugar Cane- top tier, crisp and juicy (as juicy as Juju get…)
2.) So (from JFaE)- a notch below HJ and SC, but still very good, with some crisp juice
3.) Bok Jo and Shanxi Li- Decent to eat, plenty of sugar, but not crisp/juicy (edit: some of the later season Bok Jo were better, moving up into category #3)
4.) True drying jujubes (I think Huping and maybe one other which I can’t recall)- moist sawdust and not good to eat fresh.
I think Massandra was in the area of #1 or #2, but I only got 1 fruit, so I’m not sure.
Precociousness/Productiveness:
1.) Bok Jo- very productive from the year after it was grafted (which is saying something for my climate)
2.) So- quite productive most years, after year #3
3.) Honey Jar (just below So for now, but could catch up as mine gets older)
4.) Sugar Cane
5.) Shanxi Li
6.) Li, Chico, Sherwood, GA866, Tigertooth (though I’ve heard it performs well in Florida)- no fruit yet after 4 years for at least 1 tree
I haven’t gotten any fruit from Black Sea after 4 years yet either, but it was a very small tree from OGW, so I’m hesitant to hold that against it. It’s grown enough now that it should start fruiting soon (I hope).
Honey Jar or So.
Since you are in Florida, maybe you could pickup a So (on it’s own roots) from JFaE. It looks like it would be about a 3 hour drive for you.
In 2016, my oldest So (the one which has been so productive and I sent you the scionwood) suckered. I transplanted the sucker to a rental that fall or the next spring. Fast forward 3 years (to a few days ago), and I noticed half a dozen fruit on it. This was about the same age the original tree started producing. The rootstock has the same zig-zag structure, but the fruit is much smaller. So, either the fruit size is smaller this year for some reason, or it is possible that the So I got from JFaE in 2011 was grafted to a So seedling. I’ll let you know how the fruit is.