Just to use the pony logic against them, for one if angles are included star scream would go WAY faster, he has his air resistent cone head, making go WAY faster, Also for the sole fact a mach cone appears on every jet when flying straight and not when its going down like rainbow did for her rainbow boom thing, so therefore star scram would go WAY faster. Also since the mach cone appears on a jet on a regular basis, when its flying straight, AND rainbow needs to go down and gain momentum to make it happen, plus with the air resistent cone on star scream he would go faster while going down, WAY faster then rainbow. SO SUCK MY DICK MLP FANS