Re: gibson
Headstock - Std has 59 shape and tuners have nuts. Classics are narrow 60's type w/push in bushings on tuners.
Neck - Stds come in 50's rounded/60's slim taper. Classics are slim 60's without taper.
The abalone inlays are bright and white on Stds....greenish on most newer Classics.
Pickups - Alnico 5 on Std. 498T and Burstbuckers- chrome covered. Classics have ceramic 500T uncovered.
Chrome hardware and nashville bridge on Stds. Nickel and ABR on Classics. You can tell by the retaining wire that holds the saddle bolts in place. I don't like them because they rattle.
I'm pretty sure that Gibson chooses slightly better grades of wood on Stds than on Classics, based on the Stds and 2 Classics I've owned and heard.
As a matter of fact, Gibson tends to choose their wood based on price point, so you're definitely getting better grades of mahogany, maple, and rosewood on higher end guitars than on lower end. Classics fall right in the middle somewhere.