Its not just the 100cc difference. The 14r has basically a head and cam package from the fac. My gen 2 14 puts out about 196 rwhp with bolt ons vs a gen 2 busa at 178 w/ similar bolt ons on same dyno. That's a fairly cnservative dyno, my 1441 builds come out about 214rwhp which are very cammed n highly ported
There are several Gen 2 Busas on this forum alone which make more than 178 RWHP with basic bolt ons (pipe, filter, tune).
That being said, the ZX14R won the war of the hyperbikes