Reminds me of the heated "What did George Harrison record X song with?" on TGP. "Les Paul!" "No. Casino!" "No way. It was a strat!" The debates go on for pages with people breaking out all kinds of evidence, old pics, reports, interviews and such but ultimately nobody can tell by listening.
Some guitars are quite distinctive but can also be made to sound like something completely different. How many people still believe Page recorded the solo on Stairway with an LP? It might as well be, as it certainly doesn't have much twang to it but it does have a lot of balls.
Mrs G. is right. All guitars sound the same. They all sound exactly like who's playing it.
That's an oversimplification but it's true to a point. Nobody goes to see Jimmy Page's Les Paul. They go to see Jimmy.
You can go to Guitar Center to see Les Pauls.
I'm as bad as anyone, though. Always looking for that last little bit. I'm glad Mrs G reminds me it just doesn't matter all that much. Good guitars and amps sound good (if played well) and bad ones sound like asstones.