Deferent between B 2B and B 2 C

When we thinking about business it core is manufacturing product or services and selling that process we can divide in main two category it is B2 B and B 2 C

When we thinking about that two business it core is same I is manufacturing and selling goods or services but that involve crowed is totally deferent because of that B 2 B business reference trans action by another business but B 2 C  business connect to the customers directly