Chaos Marauders Spot the Difference

Can you spot much difference between these two marauders? They both have very large axes, horned helmets and a pair of trousers. And they are both built from the plastic bloodreavers kit, right? Well, almost. The figure on the right is 100% pure bloodreaver kit - apart from the mdf base of course! The figure on the left has head and arms of the same origin, but the body is the older marauder