The Wicked B/R/T is a better match of core to coverstock. It’s a slightly stronger ball than the original Wicked. It’s a bit more even, with a little bit more hook in oil. Overall, not a huge difference, but I have found the B/R/T to be more useful than the original Wicked. It does start up a bit earlier than the original. Both Bowling This Month and Bowlers Journal rated the B/R/T as slightly stronger than the original Wicked.
Lastly, Columbia 300’s ratings bear out this difference. They rate the Wicked with a total hook rating of 47 and the B/R/T at 48.
The big difference is in how they arrive at the number. The original Wicked gets a 17 in oil and 31 dry backend rating. The B/R/T gets a 21 oil and 27 dry backend rating.