Watchonthewrist
19026
Thats a difficult question. I really like them both and each at their own way
I can easily pull off the bigger S1 and for me this is a more old school GF which i love but the more compact and beautiful BC is also a dream watch tbh. Just recently tried the new one which is amazing . Both much better irl imho 
Battle of the time-only Greubels
Signature 1 versus Contemporain. Who wins? And why? ...
The Signature One wins for me!
It might be larger in diameter but it is a lot thinner than the Balancier Contemporain which for me makes it a lot more wearable and more balanced proportionately. In addition, I feel that the Signature One is more legible and that is important in a watch...
The first. It has an overall modern look.
In particular, the asymmetric design organization of the components seem artistically overlaid and combined together, whereas in the second it’s as if they are more side-by-side for the most part. Not sure if I’m explaining my perspective coherently. Rega...
I much prefer the Greubel Forsey Signature 1
As I prefer the darker dial and find all the elements better balanced on it and more legible and it just looks nicer to my eyes. Marc
Biased vote for the Sig 1. The contemporain is more classically Greubel while the Sig 1 feels more like a one off odd ball
The Sig 1 is the most barebones stripped out Greubel ever which says a lot since GF is a more is more kind of brand. It was produced in relatively fewer numbers compared to many GF models including the contemporain. My conspiracy theory is that because Di...
I was completely surprised irl
Your sig1 looks way better once both are on the wrist. Like you said, the depth, dimensions etc.
I understand, but . . .
The posts so far decidedly favor the Signature 1. And I can understand; it is a beautiful watch. But I do really enjoy this one on the wrist . . . ...
Thats a difficult question. I really like them both and each at their own way
I can easily pull off the bigger S1 and for me this is a more old school GF which i love but the more compact and beautiful BC is also a dream watch tbh. Just recently tried the new one which is amazing . Both much better irl imho ...
Contemporan hands down
The work level and multi layering on thial alone is way better than the Sig1 ...