This is what I found online about kembayau:
Dabai and Kembayau are two different jungle produce of Sarawak rainforest. Kembayau,lacking popularity,is still very much kept as a wild and edible fruit of Sarawak rainforest.
Dabai is canarium odontophyllum while Kembayau is dacryodes rostrata forma cuspidata in latin.
1. Kembayau is darker,almost black in color while dabai is purplish in color.
2. Kembayau is oblong in shape while dabai is round and short.
3. Kembayau seeds are soft and slimy while dabai seeds are hard.
4. Kembayau has dry,thick and dull skin whereas dabai has smooth and shiny skin.
5. Kembayau has seeds that are soft and slimy whereas dabai has seeds with hard shells.
6. Kembayau has seeds that are round in cross-section whereas dabai has seeds that are triangular in cross-section.
7. Kembayau seeds are not edible whereas dabai seeds contain kernels that are clunchy and nutty as almond seeds.Chop or hammer the seeds and eat the kernels inside,though troublesome but worth the efforts once you have an unforgettable taste of the nuts inside.
Dabai seeds with edible kernels inside
The main difference is in the taste and texture.
Kembayau flesh is thin and slightly sour whereas dabai flesh is thicker,more fragrant,creamy and richer in flavour.
Dabai is just so unique,in every sense and every aspect.It is one of the gems from the vast rainforest of Sarawak.