/\ /\ yes very very different. a 98 Rs came with smaller sway bars. a 3.8l v6 normally 3.23 open rear diff and different tires and a 115 mph speedo.
a z28 came with larger sway bars, a 3.23. or 3.42 open or LSD. ls1 different tires/rims and a 150mph speedo
and the SS larger sway bars, 3.42 LSD normally ls1 yad yada yadda...
lol so what do you have? and post pics?