IIUC somewhat similar but with musig you don't have to reconstruct the secret to sign a message, so with musig there will never be an assembled secret in one place you could steal. Every participant has their own secret and then they agree on a message and share partitial signatures that can be assembled to the complete signature.

With sss you first assemble the shared secret, then you could sign a message with it, but the assembled secret could be stolen and then your complete security is gone.  

 Ah didn't consider the idea that the participants in this concept have secrets that are first split up from a single company secret.
 

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