The link you sent first is the method that I'm currently using but the complexity is very different. I don't know how many differences in spelling there are between the two data sets therefore it's hard to match them through formatting.

But the second link you sent seems very promising. I've tried it and got around 6.000 matches out of up to 14.500 values. I haven't verified how accurate the matching is. But I think combining the two methods of aligning names first and using PQ after could lead to promising results.

Thank you for sharing!

Lukas