Supersig is like multisig but with some extra superpowers. It is designed to be fit for more versatile governance of permissionless collectives. The simple feature improvements from using multisig are:
- Add/remove members;
- simpleMajority threshold instead of fixed threshold;
- "Master" user (optional), which gives one person 50% voting power, useful for specific usecases.
- Same fixed address.
The main trade off to multisig is that you cannot create a supersig in a deterministic way.