First of all, you referred to wanting to try a particle ball ... neither the BRB nor the Hornet have particle covers; the BRB is a solid reactive with an inverted, bell-shaped core, while the Hornet has a low flare core and a harder (HD) coverstock to get the ball through the heads and midlanes for drier conditions.
 The BP, BB, Terminator, and WCP ARE particle balls and on the strong side (medium oil conditions and above) and the WCP and BB have been discontinued (although there are still some NIB out there); I'd recommend checking out the LaneMasters website and see the info provided there for some initial comparisons.
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**** Official "L/LM" ball "junkie" ****
     15 balls ... and counting !!!
http://www.lanemastersbowling.com/index.html
 Man, I LOVE this game !!! And I love it even more ... now that I'm using LEGENDS and LaneMasters equipment !!!
 "Master the Lanes with Legendary hitting power" !!!

Robb in O'Fallon, IL 62269 (near Scott AFB)
LAYBZZ74@AOL.COM (Email and PayPal addy)

Edited on 1/25/2008 7:08 AM

Don't forget about the WCPP.  Took mine down to 500 Abralon and it rolls and holds in heavy oil as good as any of the Lane Master Line up.