I live in Michigan so I am not really swinging the SB98 too much anymore. The big difference between pre and post ABI bats is pre ABI can break in some but most in my opinion don't start as hot as post ABI bats. The SB98 did open up some added maybe 15-20 feet after 100 swings. The AV98 also opened up about the same. I used to have a M7598 and it was a very hot bat but I think distance wise the SB98 edges out the Mayhem. Now the Original AV was a beast that killed all these bats. It was one of those close to 98MPH out of the wrapper and just kept breaking in.