He looks like a young normal dragon to me because of the spikes along the back of his head. From what I've seen of Rankins they have fewer spikes and more rounded heads.
Oh my goodness! Your baby is beautiful!!! He's not a Rankins though. I have a pair, and if you do choose one day to have them, I do recommend it! They are absolutely adorable, and so much fun! Here's a pic of mine <3 They don't mind posing for pics!