Default Google camera exposure / play store

I recently updated to v2.2.024 and I see no difference at all between +1 & +2 exposure levels anyone else the same?

Also my play store in the uk refuses to update from v4.6.17.
Are all installed play store apks the same for all devices, ie tablets / phone / phablets does it effect the layout? last one I installed was manually from an androidpolice link.