Draconic sorcerers get a 13 AC unarmored defense bonus and +1 HP per level.
That said, I much prefer Storm sorcerers. You get a bunch of extra bonus spells, which help mitigate the problem the class usually has with low numbers of spells. Casting Mage Armor is equivalent to the unarmored defense, and you can fly with a bonus action. For me, it’s no contest.
