I’ve read the internals are the same so they should sound the same, does air have more touch controls than neo?
This outlines the major differences.
And don’t be deceived, the external shape is a major difference.
Aside from looking different, they do sound different and phone calls are different between the two as well. Personally I loved the liberty Air, but once I got the Neos I ended up liking them more. The neos not only sounded better, but phone calls didnt have static or feedback like the airs did. The neos also never fell put of my ears when I got all sweaty, where as the airs did.