I'm fairly sure most of the original ones were solids; not all of them, but most. I'm 98% sure my original black/red/yellow one is a solid.
Most of the new ones, I'm pretty sure are pearls. Not all of them, just most.
I would not get rid of your old one, until you're sure you get a new one that rolls like the old.
(FYI regarding whether any Cyclone is a solid or pearl, I will get into any arguments or discussion about whether or not anyone else agrees with me. I have seen the balls, I have read what people have said, both Ebonite staff, and plain people like me, here on Ballreviews. We have already had all the discusions. Yes, some are solids; some are pearls. This is my opinion about the situation.)