I'll add my 2 cents which ain't worth a heck of a lot BUT I have both and if drilled similarly which mine are not exactly but kinda close.
NBPP
http://i132.photobucket.com/albums/q29/scotts33/VisNBPPpolish.jpgSolid Glad
http://i132.photobucket.com/albums/q29/scotts33/VisGladSolid.jpgIf both are at OOB 2000 abralon they move similar. Glad Solid even though a solid reactive is smooth on the backend for me as that's the ball and the Mohawk core. The Solid Glad was designed to take over for the Solid Char Ex. which had the same movement. I have a small 1/2" X hole 1" below my PAP on my VAL. This also smooths it out a bit but not a lot. Not like a large hole on your PAP.
The NBPP pictured above is drilled similar to the Solid Glad no X hole. This ball moves smooth also in OOB as it's particle. I have never been able to make any Visionary particle balls jump when they hit friction they aren't designed to do that. It's the function of the particle. So, these two balls are very similar in many ways. That being said I doubt the NB Solid comparing apples and apples would be that much different from a NBPP with the same surface. Stacked or a different layout sure more flare more backend.
I'd say the NBPP maybe hooks 2 more boards for me but not a big difference. BTM rated the Solid Glad at 49 total hook and the NB Pearl at 48 and the NB Solid at 51. It will be interesting what they rate the NBPP at.
If you are looking for slightly more hook look at the NBS or NBPP if a bigger difference then the FMG or AMB Centaur Solid.
Like to know what layout you have on your Glad Solid and then maybe take the next ball up that you choose to a more hooking layout?
Just my take.
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Scott