I don't believe the German release is actually longer. I just prefer the alternate artwork on the French cover - plus, Le Nom de la Rose rolls off my tongue with far more ease than DER NAME DER ROSE, me being French Canadian and all.
I'm not attached to the cover or pronunciation of my copy, but might postage be a concern? - I'm in Ireland.
I'll look it up this afternoon. Back to you a bit later. I'm guessing it's about 6 PM there or near to?