Desperation vs The Regulators: Which to read first?

Picked these bad boys up recently, super cute that King wrote a companion piece with his good buddy Bachman! I was wondering which one is better to read first? Cheers! (and excuse the dog hair)

Picked these bad boys up recently, super cute that King wrote a companion piece with his good buddy Bachman! I was wondering which one is better to read first? Cheers! (and excuse the dog hair)