You can say that lutheran is a more liberal side of christianity than catholic.....They´re more open to abortions, gays etc. I guess you´ve seen/read about all these catholic priests molesting children.
Plus a lutheran priest can be married.
It started with Henry VIII kicked out the catholics and introduced lutherans in UK and yatta yatta yatta.........
That my opinion in this lutheran/catholic question!
Hope that helped you!