The thing is, Pyro needs something to be able to use his powers but in the future he will be able to use them without a source. Bobby can already use his powers, he doesn't need something to help him so in the future Pyro is the one who will evolve more and become more powerful. Also in that scene they were just going to show bobby freeze up the floor around him in the X jet so, not much of a power surge there.
Originally posted by BarmyBrummie
Pyro can increase the heat as much a he wants to, bobby can't keep cooling the water cus it would turn back into ice. With a high flame temperature Pyro can evaporate the ice while its still moving through the air. The flames would be so hot that the ice would evaporate in milliseconds.
I quote myself 😄