From reading the documenation about chatter, I am understanding that every post on chatter is a record on FeedItem.

Does it mean the record feeds are also a record in FeedItem?

If yes, then what is the purpose of duplicating the data in FeedItem and record feed (like AccountFeed).

If no, then can somebody tell me which feeds would be available in FeedItem and which feeds would be available in record feed objects?

Thanks,

Bakul