Even when I had the RGV at 19 y/o, I always lusted after the NSR.
Riding the NSR now, and what I remember of the RGV, the Honda seems to have a wider powerband, and perhaps a better torque spread. My extra weight now doesn't help the performance though I also recall the TZR Reverse Cylinder SP being quite a trick Jap only 250 back at that time.
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Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30