stateHash vs previousBlockHash in blockchain

Question

What is the difference between statehash and previousBlockhash in blockchain? Should the previousBlockhash of the current block be equal to the statehash of the previous block?

Answer 1

A statehash is the hash of the data inside that block.
A previousBlockhash is the hash of the header of the previous block.

No, the statehash and the previousBlockhash need not be same.