Difference between InnoDB cluster and Group Replication (no replies)

Hi,

I am new to MySQL. I would like to understand the difference between MySQL Group Replication and InnoDB cluster, is there any other differences apart from router configuration for InnoDB cluster?

In case of MySQL Group Replication how will the application connects to DB? For 3 node group replication, do we need to configure all the 3 DB nodes hostnames in the connection sting to connect to DB?

Are MySQL Group Replication and InnoDB cluster available in Community edition?

can someone please clarify my queries.

Regards,
Var