The author Borko BoskovicBB Chess is relatively older and weaker. CCRL rates the same 1.3b version on a PC with 2477 ELO. Consequently, Android port by Jim Ablett is expected to be near 2300.
P.S.: Runs perfect at 10 sec/move tournaments under Chess for Android. I'm glad to have BBchess eligible for RAPIDROID rankings.
Grab and enjoy BB Chess: HERE