The new ET has slightly redesigned TBT technology.
The classic is a bit wider, bataleon rep told me it rides likes a mid-wide.
Other than that there pretty similar. I just bought the new ET a few days ago.
Have you tried it out yet? And thanks for the info. I've only ridden rental boards so I'm not sure how a wide or mid-wide would feel. But I'll probably just stick with the newer ET.