Andrew - great signature lick!
I like the punchy mids & sparkling highs of the NS-2, but when you hit the B, the Euro is sounding just a hair tighter on the bottom end.
Two great tracks, two great basses.
If I had to pick a fave, it would be the NS-2, but as others here have pointed out, I think only us hard-core Spector-philes would be able to hear a difference in an album or live mix.
My computer speakers might be showing a difference in sound but your right as both are close....
