Any real difference in these than the 488xxx serialnumber CE-2 I just bought? It is really warm and swirly. I a/b'd with a non-smt CH-1 and i have to say, it really does sound warmet, although the CH-1 allowed for more subtle application of the chorus sound.
I doubt that there's much difference. Phostenix posted some detailed pictures of his CE-2s a while ago that showed how components had been replaced over time. Easiest thing to notice was that most capacitors had been replaced with different types more than once. The schematic layout remained the same throughout the CE-2s lifetime so I don't think there's much difference though.