1. You can look at the OEM sticker/label under the battery on the phone itself. It
should indicate whether it is the E71-1 or E71-2. Also, it should say where it is made.
2. Features - I think maybe just silly things like MMS, being able to create and use your own ringtones/MP3s, WAP settings etc. But that can be changed by doing a simple unbranding and +Kardboard+ has an
awesome sticky at the top of this forum on general WAP/data settings for Fido and Rogers.
FYI, unlocking and unbranding are two
very different things.
Hope that helps!