Right – both machines should look roughly the same. In your main profile on your MBAir, there is something – my money is still on one of your installed extension or cached data from an old extension – that is altering the way your NTP is being displayed. This is why it looks the way it should when you launch a fresh browser profile – there’s no data, extensions, history etc contained in it.
In your main profile, if that does not work, I would recommend disabling all your extensions – I notice that you have at least one different extension between the two devices (Bonjurr), are there any others? After disabling, restart the browser and check to see if the NTP still appears incorrectly.
I would also try clearing your browsing data (
Menu --> History --> Clear browsing data) if the above doesn’t work to start and see if this has any effect. On the
Clear browsing data window, I would recommend selecting
Cookies and site data and
Cached images and files) to start.