My thoughts are fairly close to Mike T here. I hesitate to make a generalization about these species. While everyone I know in Hawai'i says pulasan is clearly better than rambutan, I guess I'm the only one to rank the best rambutan higher than the best pulasan. Having worked for several rambutan orchards, I've consumed literally thousands of pounds of rambutan and tasted a good range of varieties. I don't think there's any other fruit in the world I could eat unlimited amounts of and never grow tired of. I've had unlimited access to superior lychee and longan while harvesting them, and after I stuff myself with them I get tired of them. But I have never gotten tired of rambutan. The best rambutan varieties have a complex flavor and a perfect texture. That slight firmness compared to pulasan and other Sapindaceae is a plus for me. That said, during a taste test comparison of several distinct pulasan varieties at the local research station in Hilo last year, everyone present, myself included, were completely blown away by the quality of the fruit and it proves that pulasan is a viable crop here if grown properly.