No, they are a different species of fish.
Haddock are cool water fish, in the cod family.
This is all based on your opinions and likes. Try both of them and decide for yourself.
smoked haddock and cod
HAKE
Traditionally, Cod was always used in Fish & Chips. Since fish stocks have been depleted, it is more common now to have Haddock.
Cod is a codfish. Scrod is strips or fillets of very young cod or haddock prepared for the restaurant trade.
Cod and Haddock
HAKE!
Scrod, also known as cod or haddock is kosher.
A Scrod is young Atlantic codfish or haddock.
I have found cod is a good second choice as haddock is not available in New Zealand.
Not really. They are from different genera. On your plate, however, they are somewhat similar, with pollack being a less expensive alternative to the over-fished cod and haddock.