and I own the Zeiwerk. It is a big watch by Lange standards, but quite wearable. To me the finish is superb and the complication quite extraordinary.
I think either is a good choice.
Dave

I agree with the comments above.
I think that Zenith has significantly upped thier game with the Academy line of watches. I have seen the George Favre Jacot and am very taken by it. The fusee chain is fascinating and carries with it a historically significant feature that dates back to early time pieces. It is beautifully finished and it's clasical design is something that will be appreciated for years to come. I am not sure that the Zeitwerk carries with it the same long term appeal, at least to me. I admit that I have been tempted by both but would be much quicker to pull the trigger on the Zenith. That said, I am not sure of its availability. I am told that they are sold out but would certainly pursue it as I am not a fan of the latest iteration - too modern and not the same vibe - again just my opinion.
Mitch