is this true about a 350 sbc vs a sbm

stock 340 vs 350 of the same caliber no comparison...
our local engine builder/ drag racer/ dyno expert needed to use his 150-shot of nitrous to beat my 340 with his '69 Camaro/350 ("I was on the button hard!" is the way he explained it to my brother).
And with that he beat me by about a fender in just under a quarter mile.
Not 'stock' of course, but similar builds.
Well, ok, his 350 might have been a little milder:D