Thanks Janet!
If you notice, on the U of Fl. list, for Tuscarora, they note the plant appears "stiff" & that is something that has struck me whenever I look at it or touch it. Also the bark color would be right.
Who knows? Maybe I'll find out all 3 of that color are not all the same variety. It's possible the way things get tagged/labeled these days. I'm 99% sure these came from a big box store too from what I've seen of the other plants the former owners had bought. So that is a consideration when looking at cultivars that may fit.