I can't say for sure unfortunately as my only previous experience of Ubuntu on a Chromebook was via Crouton on a Samsung which, being ARM, was somewhat limited in what you could do with it.
Elementary on the other hand I run natively via dual boot. It's nice and slick, and I much prefer Pantheon to Unity, but I can't really give you a direct comparison on this device.
Elementary on the other hand I run natively via dual boot. It's nice and slick, and I much prefer Pantheon to Unity, but I can't really give you a direct comparison on this device.