Hi i've seen 2 types of 1973 z28's. I want to know was there anything different between these cars except the bumpers and lights? THANKSfor the help

Examples

 

the solid bumper is a regular sport coupe body, while the split bumper is part of the rally sport package, this package could be combined with z28 and was an appearance package. the horn button on the split bumper, if original, should say rs. rs cars are more valuable than sport coupes, especially when combined with z28