so essentially, ensure that PS is set to the same colour space as that which is being exported by Lightroom?
And regardless of what colour space i use in camera, if i pull a cr2 file from the camera into lightroom or PS then it wont make one iota difference.!
M.
That's it!
But Like Tony indicated you can enable PS to alert you if there is a Profile Mismatch when moving an image into Photoshop from Lightroom or ACR. If Enabled it will alert you and give you a few options.

