What experience do you have with both breeds? What research have you done on both breeds if you have no personal experience? These breeds can be a lot to deal with, especially with health issues. Trust me, I have personal experience with that.
If you really want a dog, I would suggest a calmer breed, honestly. Or, even better, go adopt a dog from a shelter. You can find some great older dogs with temperaments already set. And you would be saving a life! You may not get a purebred dog, but if you just want the companionship, it could be a great compromise. I would really, really urge you to rethink a puppy at this time. They are insanely time-consuming and can be overwhelming for an adult without health issues! Either way, good luck with whatever you decide. Please stick around and ask questions. We love to help.
Forrest - GSD 9/1/2016 - 5/14/2017 RIP
Brooklyn - Golden retriever 1/30/11