I'd say the Revell snap kits look better than the old AMT kit. But, despite that I just bought another AMT '63 this last Thursday. They depict two different types of Corvettes equipment wise. The old AMT kit kit has an engine, where the Revell is a curb side. AMT's Corvette has fuel injection badging, cast aluminum wheels, and a four-speed transmission. Revell's depicts a car with no fuel injection, standard wheel covers, Powerglide and rare for '63 factory air conditioning. Which do I like better? It's a toss up. I like the idea of a car with air. But, I really like early Vettes with fuel injection. And since the fuel injected Sting Rays had solid lifters, you could not get factory air with them.
By the way, I own several of each.
Scott