MIM SSPR vs Azure SSPR

Hi,

Got a few questions around MIM and Azure AD SSPR.

So MIM has the following SSPR options:

1. Question and Answer Gate
2. OTP Email Gate
3. OTP SMS Gate
4. Azure MFA using OTP SMS gate (is this the same OTP SMS Gate as above in item 3?)
   
5. Azure MFA using Phone Gate

I also see that Azure AD has its own SSPR, so:

1. Do the same options (as per 1-5 above) exist in Azure AD as in MIM?
2. When should we use the Azure AD SSPR vs the MIM SSPR?

Additionally, MIM can also 'unlock' an AD account during a Password Reset operation - can this be done with Azure AD SSPR?

Lastly, MIM allows different Gates to be used for Extranet vs Intranet users - does Azure AD SSPR cater for this too?

Actually - what are the differences between MIM SSPR and Azure AD SSPR?

Thank you,

SK