I don't share this view, both are trust based, just because it's a fedimint do we know if the multisig are different people? Even if it is, do we know if they are not a malicious group? And where is the LN node of the Fedi hosted? The point is, if you know the guardians or the community that owns the Fedimint then it's better, and I think mutiny choice of Fedi is solid an probably the safest bet. Cashu I think it's more interoptable and probably be widely used in all nostr apps, multinuts payments is also a great feature and when mints stop using url/ip and use npubs will be even better. So I would say the best one is who do you trust or know more.