Got mine last night from Orange.
Back cover has the Orange logo plastered onto it.
On power up, you get the Orange logo appear for a second or so.
The default Sense scene is some ugly Orange one that reminded me of my old SVP M3100.
The "Internet" icon is an Orange version.
There are several demo's that I can't seem to get rid of - Have tried "settings - applications - manage" but no option to remove. I also tried the Android market and Orange's own "AppShop" but still no option to remove.
That's all I've noticed so far in comparisons to the unbranded models I've seen.
Anyone managed to get rid of these demo's without too much farting around?