it's white inside. here's a pic of the inside along with some of the tree itself if that helps!
it looks a lot like the ones they sell in the local markets from Mexico
except the flesh on those is yellowish... not white.
(mexican cream types, or seedlings of i think)
i had an Asian white that was VERY nice flavor
custardy soft, sweet and aromatic.
much larger than that one though...
maybe its a hybrid ?
my feeling is, if it tastes good, who cares.
the Asian white i had got from Lowest for $2 on sale
2 yrs later it was giving me some of the best guava ive tasted.