Hello Jared,
I know there is a comprehensive Mango database but I do not believe it includes Brix values. I am not aware of any list that includes Brix values of all the wonderful and varied fruits out there. I currently Google whatever fruit I'm trying to find Brix values for and and include "Brix" in the search in hopes of getting data with some sort of Brix reading. There are scattered lists with Brix values for Mango( most are values I added while attending mango tastings), citrus, Lychee and a few others.
A list with all the varieties of fruit you have tasted would be so useful as a starting point to get a general idea of how sweet a specific variety of fruit is. I'm afraid you are going to have to re-travel to all the countries you previously visited and grudgingly re-eat all those fruit, I wouldn't want to be in your shoes. Because I am such a nice guy, I will offer to help you eat all those fruit, simply send them to my house and I will evaluate them and even give you a Brix reading, lol!
All joking aside, I have a list of Brix readings for a limited variety of Mango, Cherimoya, Pomegranate, Dragonfruit, citrus, Lychee and Melon. The list s short and for some fruit, I only have a single datapoint. I will put it up on the forum when I get a chance. Perhaps we can come up with a Brix chart that is somewhat organized and easy for other to contribute data. Cheers,
Simon