Re: Single VS Doublecut Guitars
To me, the main difference between singlecut and doublecut is aesthetic. The roughly 4 dominant electric guitar body shapes are Fender and Gibson, each with a singlecut and doublecut shape: Tele, Strat, Les Paul, SG.
You can mix-and-match characteristics amongst those shapes: bolt-on/set-neck, vibrato bridge/hardtail, no neck angle/some neck angle, single coil/humbucker, etc. So, as far as I'm concerned, there's no "singlecut sound" or "doublecut sound". What's more important than "is there a top horn" is the kind of woods, their quality, how much wood there is, how well it's put together, what hardware and electronics are used.
If you're talking about high fret access, doublecut doesn't necessarily mean better high fret access. Some doublecuts actually impede high fret access on the lower strings if the horn is too close to the neck. The Les Paul and Telecaster have their top strap button around the 15th fret, so on both sides of the neck you get good access up to there. Neck heel shape and bottom horn/cutaway construction is more important in determining access to the frets beyond that.
I will allow that singlecuts generally have a different "vibe" than doublecuts. Singlecuts feel more solid and blunt to me.