Personally it looks that the first chick and the second are two different birds. I don't raise Partridge but I think the 1st looks normal the second not so much. Are the 2 different peeps.
I hatched them from a pair I got from Bobbi. Yes it is 2 different chicks. I accidently put 2 different chicks on here lol! The first one is the one I am talking about. He looks just like the one on the bottom pic but the lighting makes him look more like a normal partridge. Let me add a better pic that shows his color better.