OK, i've eaten many dozens of fruits of both Kai and Mayong Chid maprangs. Both are very tasty, but i like the Kai a bit more. The Kais are sweeter, bigger, and about 2 weeks earlier. Some people have commented they like Mayong Chid better because it has a better sweet/acid balance. But i find the Kai has enough of a tart twist that it's also very full flavored.
Both are really excellent fruits, and i'm really getting much more fond of them the more i eat of them. They're kind of habit forming. And they seem to fulfill a stone fruit craving that most other tropical fruits cannot do. I've been cutting some up also to put in cereal. They cut up very easily. Don't make the messy sticky mess that mangoes do when you cut them. And there is a very good pulp to seed ratio. I'm guessing they would be excellent dried, but have not tried that yet.
The 2 types of fruits look very similar, except that the Kai is a bit larger and more dark orange. I will try to post a photo of both together for comparison later.