Kevin is correct.. I sold home theater for best buy in a previous lifetime.
The models will have different part numbers from the lower grade panel at costco to the higher grade at say best buy. You will also find out they have cut corners with inputs as well to keep costs Lower for say.. Wallmart.
Also.. Dynex.. Insignia.. Vizio.. Etc are actually made by one of there more expensive counterparts like lg and others
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