Have tasted: shangri-la (good; great later in season), black beauty (good; taller tree, rarely get to taste, the birds get them all), pakistani (great), florida everbearing (good; young tree, may turn out to be great), Persian (great), Geraldi dwarf (good-great; doesn't bear as heavily as the others). Note that flavor really can be variable with climate and water and ripening...more so than many other fruit. And, maturity matters too....the more mature the tree, the more consistent the flavor from year to year.
All grow easily here in Phoenix, some shade always helps when young, but these trees are almost bullet proof in my climate. Shade, sun, east exposure, west exposure.....doesn't matter; just water and stand back.