LS -- Lighter, NA, manually adj suspension -- although race inspired, no rear seat, added aero pkg that pretty much makes ground clearance a little above 0, takes some serious driver effort, special tuning key, sound deadening material removed (read, loud inside), rear seat located cross brace. Has smaller dia wheel/tire. Live Axle

ZL1 -- Heavier by 470lbs, FI, computer controlled adaptive suspension, rear seats, less ground clearance reducing areo pkg but still looks low, heavily computer controlled -- driving is a bit easier (from various reports). Internal noise should be much less. Has larger tire contact patch. IRS.

Not even close to being the same car... About the only things they have in common are V8, RWD, American and ICE.

I still like reading about them... But, these two aren't exactly classed directly to each other.

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TVS2300 @ 9PSI, DougThorley LT Headers w/ Magnaflow HF Cats, Borla Touring, Cold Air Inductions CAI, RX Catchcan
Pedders Track-II Suspension w/ Xa Coilovers || PFADT Sways, Trailing Arms, Solid Cradle Mounts
Hendrix Engineering L5 Axles, DBA4000 Rotors, Carbotech XP10/XP8, Motul RBF600, GTO clutch reservoir
Heritage Grille, MPD-1 Spoiler