Thanks! I can't really say which I prefer because I haven't used the 595's in a while and have gotten used to the 598's. I am annoyed however with Senn over this graph. Their impedance are way off, granted this is for different cans but I'd imagine similar for others as well https://cdn.head-fi.org/a/1669102.png I do remember putting on the 598's and everything sounding darker/bloated whatever you want to call it. To me they need equalization badly compared the the 595's which sounded crisp, open and easy to listen to.