The cup sizes are the same, so both headphones sort of clamp and squeeze me in all the wrong places. The Classic is definitely built with better materials (much better actually), but overall, I prefer the FSP's sound-signature; it's so exquisitely clear and clean without ever becoming analytical. It's amazing actually. So many so-called neutral headphones lack warmth, but the FSP retains just a touch of warmth, which, btw, never compromises its neutrality. So if you want a crystal-clear, scrupulously clean sound punctuated by punchy but well-behaved bass, then the FSP is the only way to go. If, on the other hand, you desire more gravitas, more bass presence, a warmer sound-signature with a slightly relaxed upper-midrange, then the Classic will please you more. It boils down to preference. I'm definitely keeping both headphones. What can I say? I love them both.
Warm sound sig means laid back highs and increased lows? right?
And what does gravitas mean?
I prefer the looks of the FSP by the way, i think they are sexy.
Thanks for the explanation :)