they are both just lessers. I like the one on the left, I'm a big fan on the clean pattern look. nice snake!
pastel lessers will have a different eye color than lessers, and the yellow stripe that runs across the top of their eyes, usually will be kind of jagged looking and not smooth like yours because of the head blushing that the pastel gene will usually do to a lesser. if you go into my profile I have pics of a lesser and pastel lessers that came from the same clutch. notice the difference in their top head stripe. hope this helps, don