Buying clothes made in Eastern Europe (Poland, Czech Republic) and Tunisia
Is this slightly better, in terms of ethics, than buying clothing made in China, Bangladesh, Vietnam, etc.?
You can always spot clothes made in Poland.
Why would it be more ethical, OP?
Depends if the label is proven to be ethical, if not it's a crapshoot. Lots of Eastern European companies import from sweatshops in Bangladesh, India, China etc., and re-label as Made In wherever.
Either go Amish or learn to knit is the way forward. It's the only way to be sure.