Well the CR-48 should be a faster, since it uses a real processor rather than a fast smartphone processor, RAM is the same, HD is the same, screen on the CR48 is 13.3 and MATTE, battery life..... I got 8+ hours using it with Windows! Never really used the Chrome OS but I can only assume windows 7 is more power hungry. It is now back to Chrome OS and in it's box. New one has 3G if you goto the 330 model rather than the 249 model however the CR48 came with 2 years of free Verizion 3G once activated, never did this either. CR48 has a USB 2.0 port, new one has a 3.0 port. CR48 also has an SD slot, which came in nicely when it was used as a computer on the kitchen table to store music on, and the new one has HDMi vs VGA on CR48...... don't think either would matter on that end.
Honestly I'd say the CR48 is still a better version of it and even compared favorably to the 499 Chromebooks.