Hopefully you are comfortable with your purchase, and as pointed out for the FP3+ the rear camera has a white rim and the back of the phone is opaque.
There are other diffs, the bottom speaker module is updated and with it some hardware on the core module.
Upgrading FP3 cameras can be done but not the audio improvements.
For specs on each see https://shop.fairphone.com/
If you are not happy you have 14 days to return to Vodaphone but you probably have the FP3+ which has no bumper as well.
Also note this is a user forum and if you have faults with the phone ensure you contact Vodafone and/or support@fairphone for advice etc.
Whereas there are many users here prepared to help you understand the use of the phone don’t delay in asking for official support for failures of the device, and ensure you have the latest update for the FP3 and FP3+