QDV vs a Mechanical chamber sealing valve

[iknowmy3tables]

alright, so there is some difference, and so can we conclude that barrel sealing piston valves usually have higher performance than their chamber sealing equivalents? with the exception of a few cases particularly that are more likely when the air barrel is very short, the projectile is extremely light and easily exits the barrel, the pressure is very low, the pilot very fast and has very high flow, and a smaller sealing face on the barrel sealing piston valve, any other cases you you guys can think of? if you have your own idea for a formal conclusion please post it, or of course further objections