@badlogic You are right, certainly not by that amount. It seem that Germany has 19% VAT for beverages compared to 20% in Austria, so not significant.
They have only 7% for some articles like food and we have 10%. Apparently we also have 13% for some articles it seems.
So yeah, you were right about roughly 1-3% difference.
I wonder whether the German "Dosenpfand" plays a role in the Redbull comparison, but I have no idea how that works.
What is for certain is that the Oligopoli is a problem.