I out A8 into my JB. I posted in other threads about it. Basically I am missing some musical overtones that A2 and A8 have, but in the case of the JB A5 doesn't sound good to me here either. The JB8 has a kind of "hollow" sound that some people would like. The Alternative 8 has even heavier coils, I guess that comes out better.
Oh. I misread the thread title as "JB", not "JazzB".
In my Jazz neck the A8 sounds "core"y.