[alanbike]

Externally:

The rear lights are different (in the form of glasses for the export version, double lights for the US version)
Exterior retros: larger, foldable and incorporating flashing repeaters on the export version (EU)
On 2012 versions, no roof antenna on the EU version
No headlight washer nozzles on the US version.
No V6 version in the US.

Interior:

Different steering wheel on US models before 2012, then they homogenized US and EU from 2012.
More basic dashboard on pre-2012 camaro: no faux leather medallion or aerator hubcaps

The equipment of the EU versions corresponds to the 2SS version of the US, there is no lower-end version unlike the US (1LS, 1LT, 2 LS, 2 LT, 1SS, 2SS)

Level suspensions, the EU versions are equipped with the FE4 as a base, which was an option in the US.
The electronic management box is specific to the EU version.