I am fortunate enough to have friends who come from various Asian countries and regions,and I have been cooked for by them all! I cannot tell the difference between them ,being quite honest,but I know that I like them all when cooked by natives of these countries!! Some of the loveliest Asian food I have been lucky enough to ear is from Thre Phillipines.My godson's mother is from thee,and her idea of a simple dinner is my idea of a full banquet!!
The pedant in me is forced to point out that there really is no such thing as "Chinese" food - there are many different areas in China and they all have different kinds of food. The most well known is Cantonese but there is also Hainanese, Szechuan and, well, as many as there are regions! And yes, it is possible to tell the difference between them.
Anyway, to answer your question, I like pretty much all kinds of Asian food equally, I wouldn't want to put them in order or choose between them!
Thia would be my top choice because I have yet to find a Thai dish that I haven't enjoyed. Vietnamese next and Chinese last but that's only because so many Chinese restaurants westernize their food and it's never as good as authentic Chinese cuisine.
I can't explain the difference, but I think I'd be able to identify the cuisine if presented with a dish. I've never actually had Vietnamese, but would prefer Thai. My husbnd raves about 'actual' Chinese food, i.e. food he has eaten in China.
At the moment I'd rather have Chinese food, but that's because we rarely have it and we always eat Vietnamese lately. We used to eat a lot of Thai but seem to have moved on from that too...funny, hey, how it moves in fads. But yes, I can pick it. Different spices and flavours....
My family loves Vietnamese, and Thai food, Malaysian and Japanese; but Korean, Burmese and Laos cuisine are definitely the top favourites. Filipino and Indonesian food is really pretty bland for the most part once you are accustomed to other Asian foods, and not very creative. At the bottom of the list, Chinese food has zero appeal for my family, with the exception of Szechuan dumplings.