Yes, they are the same animal. Panther chameleons "fire up" when excited or threatened, so he will go from his relaxed green coloration to that bright orange/yellow. If you were to show him a female or his own reflexion in the mirror you would see him show the same colors.
I agree with Olimpia. The photo they showed you is fired up. But I have had 3 Sambavas that, when they were 2 years old, they were mostly red and orange, even when resting. Sambavas are a fun, feisty, locale, and you have an excellent, very beautiful, example of one there. Even in his resting colors.