On this side of the ocean (Europe) German versions are just as common as the English versions.
Gameplay is the same and after a while you get used to terms like "gekippt" for "tilt" and "spiel aus" instead of "game over".
A local operator over here used to change backglasses for getting a more appealling game sometimes over the years, so it could be you had a German Capersville with a English backglass.
In money terms?
German ones where always a little less popular over the English ones, but nowadays you are sometimes glad you have one of your favorite games and it doesn't matter.
A good friend of my has bought a Fireball German version and is very happy with it, it didn't matter if it was German, it is a Fireball, or Feuerkügel in German (or something like that...)