I am performing an upgrade of the Polkadot version from 1.8 to 1.9, which involves updating the from_genesis function to the builder function in the chain_spec file.
I generated one chain spec without integrating the builder function (referred to as old_chain_spec). After integrating the builder function, I generated another chain spec (referred to as new_chain_spec).
I then compared all fields between the old_chain_spec and new_chain_spec. While all fields are identical, I noticed that the code field is different.
Is this approach of comparing both chain specs correct? If so, could you explain why the code field differs between the two specs?