Brand-related inflation marks up pricing according to the brand class.
To me it's nasty, ignorant and disrespectful to the customer cheap trick. Definitely those inflators aren't ones to trust because you might never see your unit back.
Same story happens when you drive in with classy german car to the shop and quick job like replacing that measurable ignition coil will cost you $400/hr labor. Business is GOOD when dummies are around for sure.