The final alpha character typically designates the tune that's on the vehicle, however this is normally not listed on the actual engine label.
A good example of this is the 2018 Arteon, compared to the 2018 Golf R the engines are identical however the software/tune is different. The 2018...
Custom Napa and Perforated Leather MK7 Golf R Steering wheel. Steering wheel was never installed, ordered it a few weeks prior to deciding to sell the R: 500 shipped within the US.
All the pictures were taken after the lip was removed from the car. I failed to include the picture of the small scuff, post has been updated to show it now.