Trees I have seen and heard of have been much smaller than normal star apples. Is this your experience too Oscar?
A grower here has one at the back of his house that looks like a regular small sized tree, whereas his Haitian out the front yard is a monster.
Flesh is kind of 'milky' from memory. Maybe a bit firmer than some almost jelly like starapples, but not by that much.
I'm sure its the same as Peter S's trees. He has the full set and is incahoots with others that have it.