the B2 board preforms a lot better then the V35 and a little bit better then the B.
I like my B2 board over the B b/c it's got more options for the sound. I put the sound setting on 4 and it worked 90% of the time, but it on 5 and it goes off if the noid of my PM6 clicks.
Then it is faster then the Reloader B. Even on setting 3 it's faster then the Reloader B board on setting 3. You'll never need a setting above 3 or 4 on the Reloader B2 board.
If you have the money def get the B2, if you want to save a little more then get the B. Both are good boards, and I've used a reloader B board for 3 years now. And just got my B2 and haven't looked back yet.