I'm pretty sure that the 83-85 VFs, the VF1000Rs, the RC-30, and the RC-45 are the only ones that use the "big-bang" firing order. The difference is generally called the 180 vs 360 degree crank. I couldn't tell you which is which, but the modern VFR has the one that is not as effective, but has a more V-8 like rumble. That rumble is the exact reason that it is used, afaik. Yamaha put it in the V-Max and people raved about the sound, Honda jumped ship and the VFR has been steadily gone down-hill since. :rolleyes:
The sound on my bike is less VFR like and kind of droaney. I think it's a sexy combination of and inline and a V with a torque curve that is boring to look at.