“Hatch chilies are nothing more than Anaheim chilies grown in Hatch, New Mexico.”
Try telling a wine drinker that hillside Rutherford Napa Cabernet is the same as the genetically similar stuff that Gallo grows in Modesto.
A number of distinct cultivars are grown in Hatch that are genetically different from the Anaheim grown in southern california: Big Jim, Joe Parker, Sandia, etc.
As I said, much ado about nothing.