A:Answer There is no difference in the tv, except that x90ch is sold exclusively through clubs like Sam's and Costco, and perhaps also at shops that are available only to military personel, and because of the model number difference they can offer it at an exclusive price (typically only $50 less than big box retailers) or bundle with extended warranty through the club. Sam's and Costco, in example, may offer 4 year extended warranty, plus 1 year through the credit card they prefer. Your credit card may offer the same 1 year ext warranty, but call and ask for what benefits they offer. Retailers that sell the x900h cannot offer their sets at lower rates beyond official/manufacturer approved sales. There is also an Act of Congress that prohibits shops for military personnel from slashing prices on goods to undercut public retailers. Also, abroad, the X900h (USA) may have a different model number (ie X90H in the UK), but is also identical otherwise.
