Loquats are sweet, lightly tart and deliciously juicy. A bit like a very firm peach or plum.
Longyan (dragon eyes) are like lychees but smaller and yellow. They're less sweet than lychees (which tbh I often find a little cloying) and maybe a little more flavourful.
Image isn't working for me unfortunately but yeah, they real pretty. I first had some in Taiwan, the owners of a small cafe gave us a branch from their tree.