Re: The Ultimate Les Paul Tone
Indeed wood is the KEY.
IMO, when shopping for a Paula you really need to pull down several. And be prepared to pull down ones that you may not like the color so much on. Or a Custom when you are looking at a Standard. Or a Deluxe or whatever. Cos ultimately if you get a tone monster, you will forget about the color and other minor things. There are mini replacements for Deluxes/DiMarzio P90 buckers that will fit, Custom winders who can get full size bucker tone in a mini etc. Anyhoo getting off topic.
Pull down a few and DON’T EVEN GET NEAR AN AMP.
Play each one acoustically for several minutes. Then go through each one playing some open chords for about 30 seconds then switch. You will find one or more that has a clear tone..it will be a little bright on top but alos full sounding..not thin and have good bass response. It will alos shake your guts/fretting hand the most (resonance)
You can do a headstock test too for sustain/resonance. Hold the guit by the top of the headstock with the pup side facing away from you. Reach around and just strum the guitar loudly. Keep your ear near the back side headstock….you will be able to feel/hear the resonance and sustain. The vibration and sustain will die off quickly on some, take awhile on others. Obviously you know which one is better.
Once you get 2 or 3 that are the best. Inspect the bridge area. On the production gibbys and their rocker neck joint, you will see A LOT that have the stop WAYY high. This is because the neck angle is not quite right, and putting the stop this high facilitates lower/easier action without the strings hitting the back of the bridge. This is not a deal killer, because you can always top-wrap and drop the stop if you’ve got a killer piece of wood (tonally). I’d rather do that than have a not so great piece of wood with a perfect neck angle.
Then plug in and play at a decent volume. Not Marshall stack levels or even gig levels. But loud enough to where you can’t really hear the unamplified strings much. Don’t worry so much about the amp or pickups or even minor setup issues. A good one will have a cello-like lower mid that just sings for lack of better word under gain.The notes will take off into (controlled) harmonic feedback easily. Bend some notes a full or 1.5 steps in the 12th/ /14th fret position with the neck pickup engaged on the high E, B, and G. If you are ready to release the bend before the note stops sustaining, you got some good wood

If they die off quick but it sustained well and resonated well acoustically it’s prolly a fret or setup issue. Something that can taken care of. Even if you don’t play with a lot of gain, these are good tests to do, IMO.
If you are looking at Standards (current ones) or older models with 498/490s, remember they are bright pickups with some harsh high end until they are adjusted properly. Take that into consideration. If the shop doesn’t have them set up well, I find BBs and 498s sound clearest and less harsh with the top of all the poles flush with the nickel covers. BBs sound better set lower than you may think, and 498s seem to sound better a little bit higher when the poles are flush. Again though just remember that pickups can be changed. If the acoustic tone is there, you know you can put whatever Duncans in it you like.
I have no empirical evidence to support this, but IME, the bigger the neck, the closer you will be to that classic Les Paul sound. Not every case, but apples/apples a 50s production or Historic neck is gonna sound better compared to a 60s or Classic profile. The thinner necked guitars seem to produce a more middy less balanced/clear sound. YMMV, but that’s what I’ve found in general.