Yep right there
its raised then dips back more towards neutral.. it sounds brighter than a neutral sounding headphone like sennheisers
660s are ridiculously good at imaging qualities both are good but id say 660 wins there. Though a 660 is an open back if were talking open backs youd want to look at HD 560s as an alternative to the 600 since it has more stage, 660s for its imaging, or if focal.. youd go from Elegia to the Elex