It's probably guitar-dependent. I love the ones in my PS, which is a solid body model with a Narrowfield middle pickup.
I don't find mine to sound anything like my current or previous PRS' with P-90s. P-90s are often darker-sounding pickups with more midrange honk. These have plenty of upper-midrange and high frequency sparkle, and seem to me more a cross between a Fender style single coil and a traditional humbucker. They're also sparklier than a traditional humbucker, without the horn-like upper midrange of a P-90, especially at the bridge position.
They're very airy and open-sounding, not congested/compressed like most P-90s or some traditional humbuckers.
This isn't a knock on P-90s; I love my guitars with P-90s, and that's also a sound I find very useful in my work. And I love my humbucker models. But, horses for courses.
I do a lot of recording with mine, and don't have the problem mark refers to above. I think it's the most beautiful-sounding guitar I've got. I often use it where other people might use a Strat for its shimmer. It's straight-up my favorite guitar for clean tones, by a mile.
I've had a Sig Limited and 408 as well, and liked those with the wider bridge pickups quite a lot, but prefer the Paul's pickups.