Upon looking through them, I have found interesting advertisements in two of them:
According to these, Vogue Paris Original designer patterns were at this time in Germany available exclusively from dealers who sold Burda patterns. So it looks like Burda an Vogue had a special deal there. It's also mentioned that these dealers would have had a special "Burda-Chic de Paris"-catalog showing these patterns. They would obviously not have had an interest in their selling "normal" Vogue patterns too, as these would have competed with their own. I haven't seen this advertisement in any of the other Burda issues I own, like October 1965 or March 1967, so I'm wondering if this maybe was a fairly short-lived deal. The June issue mentions though that two more patterns were advertised in the May 1966 issue. Maybe they were also too expensive. According to the price list at the back of these magazines, normal Burda patterns that you could order or buy at the counter separately (for example, a different size than what was included in the magazine) cost from 1.50 to 3.50 DM (German Marks) and the magazine itself cost 2.30 DM. The Vogue Paris Original patterns however cost a whopping 11 DM - even for a little summer dress like the one shown in the June issue!
Burda never did "designer" patterns on a big scale like Vogue as far as I know, at least not in those they sold separately. I remember a time ca. in the late 90s when each magazine featured a pattern by a designer. There's an image of a bell-bottom pantsuit designed by Karl Lagerfeld for Chloé in my head that I liked greatly at a time. And my 1993 issue of Burda International features some designer patterns. But Burda International was different from regular Burda and appeared less frequently.