I'm allergic to both... they make my lips swell up a lil lol but i loooooove lychees! plus they sound the same as my chinese name :]
ive always liked lychee better. the frst time i ate lychee for the first time. i ate too much, the nex day i had like red spots all over my body. and i was red like a lobster. i had to stay in bed for 2 days.
there is one time i ate too much of lychee i'm getting those " 5 fire burning felling inside me" during the night and it making me want to hit somebody hahaha but i like this the most.
I love lychee because its got more flavour and juice *drools* but for some weird reason I love the dried longan
wow i havent had longan in so long i always have lychee so its pretty bland after a while but i would say longan taste better