In my experience with Puritan 156, I have tried both of Puritan cords. The OE cord and then the upgraded Ultimate cord and it was a noticeable improvement however, all my after market cords surpassed them both- some in dynamic, some in musicality, some in both categories.
My aftermarket cords are Sablon, Gran Corona, PS Audio AC12, Verastarr Statement Silver, Virtual Dynamic and lastly the affordable Ice Age Cables 10awg silver and Ice Age Cables 10-awg copper.
Puritan156 is an amazing power conditioner. The best one I have ever had.