54-55 panel vs suburban

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looking for info about the difference between
a 47-53 GM panel trucks and 47-53 Chevy Suburban
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also seeking the difference if any between
54-55 GM Panel trucks and 54-55 Chevy Suburban
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now i thought the only difference was suburban had windows
in the body
but i have different kit listings for
47-53 panel and 47-53 suburban kits (2 diff prices too)
but only a listing for 54-55 panel
my question really is i guess is 54-55 panel and suburban the same inside?
seeking info differences like headliners?
the reason i ask is
i am a rep for a reproduction company and the listings for the above is not clear and like to have the correct info before offering the headliners for sale
so thought i'd ask those who may know