Once setup, using it is easier, especially between two core wallets.
However Ledger isn't going to sign anything without first registering the BIP388 policy, and then passing it back (along with an hmac) at signing time.
Core can't currently produce this BIP388 policy and it can't store the hmac provided by the ledger. So you'd have to use the Ledger drivers manually (lookup Moosig). Not fun.
I forgot what ColdCard requires, if anything, maybe passing psbt's around already works?
Once setup, using it is easier, especially between two core wallets.
However Ledger isn't going to sign anything without first registering the BIP388 policy, and then passing it back (along with an hmac) at signing time.
Core can't currently produce this BIP388 policy and it can't store the hmac provided by the ledger. So you'd have to use the Ledger drivers manually (lookup Moosig). Not fun.
I forgot what ColdCard requires, if anything, maybe passing psbt's around already works?
https://github.com/bitcoin/bips/blob/master/bip-0388.mediawiki