Not true again. Apple will not price match competing retailers. However, they will give you up to a 10% discount if a competing retailer has the MacBook you're looking for on sale. For example, if Best Buy has the 128GB 2018 Air on sale for $999, Apple will give you 10% off the full retail price of the same 2018 Air: $1079. Not a price match but close. This isn't a policy they advertise; you have to ask for it in store. And I think it's at their discretion.
The 'pricematch' works the same way. Depends on your store.