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Difference between AlwaysOn FCI and AlwaysOn AG

The differences are collected from different articles online available


Sno.
AlwaysOn FCI for HA and DR
AlwaysOn AG for HA and DR
1
Shared Storage solution
Non-Shared Storage solution
2
Instance level HA 
Database level HA (can be one or more databases)
3
Logins, SQL Agent jobs, certificates and other SQL Server instance level objects are in-tact after failover
Manual adding logins, SQL Agent jobs, certificates and other SQL Server instance level objects to all secondary's
4
Instance-level protection without data redundancy
Each group of secondary AG database(s) are redundant copy of primary
5
Have Active\Passive nodes. No concept of a secondary database.
DR replica can be Active Secondary for backup, read-only workload.
6
Application connects via virtual server name
Application connects via AG listener name
7
Does not maintain a redundant copy of the data hence does not protect against an I/O subsystem failure
Protection against an I/O subsystem failure i.e Automatic Page Repair
8
No special requirements with respect to database recovery models
Database(s) in AG must be in FULL recovery model


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