So basically the Neck PU remain at the same position on the body, but the neck, the bridge PU and the Bridge goes up.
Anyway for me I tried a C24 and a really disliked the neck position (lack of bass).
But several things altered my feeling during this test:
- The amp was not set-up to my taste and the amp was not my favorite (certainly because it was too new to me)
- The regular neck profile is not what I like.
- and I am not sure to be a fan of VB/HFS set...
Basically, the neck PU doesn't move - the routed cavity is in the same place. Because of the extra two frets, the 'nut' is slightly further away from the neck PU. To keep the same scale length, the Bridge and Bridge PU is brought forward a bit towards the neck.
Whether you feel it lacks Bass or not, or maybe its because the Pick-up is a bit brighter so you hear more of the high-end which makes the other seem like it has more bass rather than being 'less bright'
- The amp of course can compensate with some tweaks and the array of pedals can also be tweaked to suit the flavour of tone you want. Having a bit more brightness from the neck can be beneficial in a mix, give a bit more clarity and stand out against the bass and drums.
- The Custom 24 comes with the Pattern Thin and Pattern Regular neck, I don't think the Custom 22 comes in Pattern Thin (just Pattern Regular) as standard. If the Regular neck profile isn't your thing, then the Custom 24 offers a Thin neck and you may have to pick a 594 (Pattern Vintage) as a 22 fret Core model - or he DGT for example.
- The Custom 22 and 24 both come with the 85/15 Pick-ups if you buy NEW. That also goes for the CE24 and you get the 85/15 'S' Pickups for the SE/S2 version(s) of these guitars. I don't know exactly when PRS replaced the VB/HFS set but any PRS with these are 'used' and that's if they haven't been switched out. You also have no idea if the guitars are set-up properly with the right Pick-up height - whether that means 'right' by PRS spec or right for you - these can be different.
I also won't give my thoughts/opinions on used gear - especially if its not my 'used' gear. Firstly, its not the current specs and relying on the used market to be selling a 'stock' older model. By stock, I also mean that it is 'factory' set - never had the PU's or electronics messed with and set-up to be exactly as it was when it left PRS. Certainly for the last few years, the Custom 22/24 has come with 85/15's which you may prefer in either/both 22 and 24 fret guitars - more than the VB/HFS PU's.
There is NOTHING wrong with preferring either the 22 or 24 fret guitars, preferring the tone of one for whatever reason you want. Picking a guitar on its tonal quality/difference is, in my opinion, far more important than picking one because it has 24 frets or because its fractionally shorter. That has been my entire point in this discussion. People shouldn't be concerned whether the Neck PU was moved or the bridge, should worry about which is the shorter/longer guitar. The neck carve difference can be minimised if you look for Pattern Regular Custom 24's and even that isn't a big difference - the Thin isn't 'Wizard' Thin and the Regular isn't a baseball bat neck either. If you don't or very very rarely go above the 20th fret, then it only comes down to the tonal difference which isn't 'massive' but it is certainly audibly different as the reason to buy either. Unless you can see the owl. it can be incredibly difficult to determine which is which visually and I bet if you were blindfolded, assuming both have the same neck, you probably wouldn't notice the difference in terms of feel and playability - you would have to rely on the tones of the neck PU only to detect a difference. Point is, they are incredibly close and the tonal variation is the primary reason to buy either and own both because of the tonal difference.
If I didn't have the Special 22, I wouldn't feel like the Custom 22 would be a pointless purchase because I have a Custom 24. It would be a different enough (4 out 5 tones are 'different' because of the neck) guitar to add to my tonal palette...