Yes, it is tigertooth. I bought bare root TIgertooth from Just Fruits and Exotics in Florida year a go. Those trees are full size and have been bearing heavily and reliably every year. It did take a while for them to start producing. These two trees are much younger. They came from root sprouts from the original trees. I dug up the sprouts with a little bit of root when dormant. I put them in 3 gal RB2 rootmakers for a season then planted them at the retirement property. This is the first year they are producing.
I'm in zone 7a. I as skeptical at first. I see most jujube producing in different climates than mine, but once the trees were old enough they really started producing heavily. The trees at the farm get zero care.