I too think they are the same dog. I have had three of them. Great hunters and house dogs. All three lived to be about 17. Try to get one with a good stiff coat.
I have had an English Setter, Lewellen setter, brittney and 3 German Whirehars/Drathaars. Enjoyed the Drathaars the most.
This one doesn't look like the typical Drathaar. Usually they are more chunky.