I have a low load particle ball, the Ebonite Predator, and I believe it is sanded. However, some sites say that the ball comes sanded and others say that the only one made was the Red Sparkle. Ebonite's own site seems to say that there was a sanded. The big difference from what I noticed was the color of the logo. The reason why is because even though the sparkle is obviously more polished, and possibly a pearl, the previous owner of the ball liked to buff the finish off of all her balls. That would take the surface similar to the sanded if I'm not mistaken, I would just look at the logo color being that the sparkle was yellow while the sanded was white, but over time, the ball no longer has a color on the engraved logo. So I'm stumped. it reacts pretty well if it were once a pearl but at the same time being low load particle, it still tends to hold line for a bit longer than most particle balls. Still, the backend can be jumpy when used on my THS just because it likes to cut into the pocket a bit deeper sometimes.
The particle will indeed make a difference in hook. but if the lanes are too dry, which lately most house shots I've been shooting have been, the ball just either cuts too much on the backend or rolls out due to not finding enough oil in the heads. Particles stopped being such a large issue in the coverstock I believe because more ball manufacturers were able to create powerful hooks without the additive, which in most cases, I think was silica, but don't quote me on it. Seeing as how so many house shots just weren't very friendly to particles, the market for them mostly died out and high oil balls took over. Some companies, like lane #1 still make a decent number of them if I'm not mistaken, but most companies seemed to have shied away from them lately.
You haven't hit the pocket well enough until you've Wrecked the Rack!
I'm an English major, "if my doctor told me I had only 6 minutes to live I wouldn't brood. I'd type a little faster."