Hussar
Legend
Back in 3e there was a race called "dragonblooded" that I was a lot happier with than half-dragons. They had less draconic blood in them, and much smaller stat boosts (and therefore made better PCs). I suspect the concept of playable dragon people in 4e came from there.
Also half-dragons could be half-anything, including some really ridiculous combos.
If in your world half-dragons only get small benefits, then I rather doubt there is any distinction.
My personal favourite is a half-dragon Gibbering Mouther. Nice sort of mini-Cthulu