Red Bull is not made in Austria, at least not necessarily. The European company is headquartered there, but its business model is largely just owning the IP. The filling of Red Bull cans is outsourced to Rauch, which produces at least some of the product in Switzerland.
The swiss-made Red Bull is exclusively for non-EU markets. It is a customs/cheap water/nearby headquarters thing.
A lot of Red Bull is made in Austria too.
I get the feeling that the same tricks are being played in Switzerland. Coop and Migros feel a lot like a duopoly, and discounts also cyclical. Not unusual to see 40% discount on outrageously overpriced detergents, for example.
In Switzerland such pricing tricks would be somewhat expected since it's not an EU member meaning it's isolated and less impacted by the free market pressures and competition from the union.