I only can report to Thomasville. Thomasville has two big advantages, very good frosthardiness (by protection from wintersun) and very delicioud fruit, I tested my first one two weeks ago and I was surprised by the very good flavour, in my taste a mix of orange/pomelo/ grapefruit, no bitterness.
Only disadvantage is the late ripeness of the fruit, in March/April.