personally i am quite sure that they cap sooner,
And I am telling you that, salary wise, you can also find allstar SFs who cap in the 55-60K salary range. Maybe not balanced ones, I do not have the data to say for sure and these players are rather rare. But for sure unbalanced ones who are trained almost exclusively in jump shot.
Anyhow, your one German example could just be one with a low sub-level on potential. As with anything, you cannot say much just by looking at one player.
Run of the Mill Canadian Manager