>>107029290
The first one is the Pro, the second one is the non Pro. It's a retarded naming scheme since those are essentially two different headphones with different tuning. The Pro is an open back planar magnetic headphone with a neutral tuning and the non Pro is a cheaper, closed back dynamic driver headphone with a bass boost. The first one is better imo but if it's a closed back you need then the cheaper FT1 without the Pro is the one you're looking for.