Editions: Daedalus Rewards
Going forward in Shelley we will have a 15-word recovery phrase for Daedalus that is can be used in both Yoroi and Daedalus. Currently, on the Incentivised Testnet, if you create a new Rewards wallet in the Daedalus Rewards you will have a 15-word recovery phrase. In future, if you create a wallet in the Yoroi Shelley Testnet then you will also have a 15-word recovery phrase. You will be able to restore that in Daedalus Rewards and vice-versa because they are designed to be compatible.
Conversely, you cannot use a 15-word passphrase created in Yoroi on the mainnet, in the Yoroi Shelley Testnet, or in Daedalus Rewards because it was created in a Yoroin Byron wallet which is not compatible with Shelley testnet (even though they have the same number of words).