Then explain why a Store specific brand only has 2 HDMI's while a Sony bought one (One Not made for a particular store ) has 3-4 ?From Sony-
The difference in the model numbers is based on the type of store they are sold in, and their warranty terms. For example, the A80CK is the same as the A80K, but the models A80CK is sold at membership-only clubs, such as Costco. Please check the documentation that came with your TV model for its warranty terms.
HDMI's are just 1 difference, there are others.
Fwiw, most manufactures do this, not just Sony.