Whenever I checked, trains from north Germany to Austria and back were always significantly cheaper on the ÖBB site. It was bizarre.

It's just price differentiation in action. A Polish ticket for the same train can be a third of the price of an Austrian ticket. People are rightfully pissed when this happens to them online, yet they seem to accept it for trains. I don't understand it.

Strange, I don't usually hear Austrians complain when they get paid 3x for the same job a person does in Poland.

Austrians moving to Poland doing any specific job will pe paid exactly the same as the Polish. Similarly a Pole working a job in Austria is paid the same as an Austrian doing the same job.

The fact that there might be a wage difference between different countries might be interesting, but it us utterly irrelevant to the fact that there is a price difference between tickets sold for the exact same train. Not an Austrian vs. a Polish train -- literally the same actual train with the same finite, exact seats for sale.

Do they, though? In 2024/2025?

A bit more than twice.

Before tax...

Really? When traveling from Poland to Germany, it's cheaper to buy a ticket from DB.

I suppose it varies from case to case. I've only done Austria<->Poland, with tickets bought from AT/CZ/PL.