"They both can control fire altough Iroh has more experience. I`d say Iroh would win because he can reflect most of Pyro`s flames, destroy Pyro`s equipment (leaving him unable to make more flames to control) and show him how powerful his lightning bending is. "
"Pyro's pyrokinesis is very limited and he can easily be harmed by any fire he cannot control mentally. Iroh being one of the most creative firebenders in the Avatar series and one of the most skilled would pick up a far easy win against Pyro.1. Iroh's firebending skills are legendary and he has been displayed the most powerful firebending blast in the entire series even though his power was being enhanced by Sozin's Comet, he created a ring of fire around him and other White Lotus members and allies, expanding it and shrinking it with every breath in and out, after a few breaths he focused the ring around him into a ball from which he unleashed a fireblast that blasted through the inner Great Wall of Ba Sing Se. Though his abilities were being enhanced by the comet this is an example of his impressive skill and power in firebending.2. He has been shown effortlessly defeating on separate occasions a group of master Earthbenders with ease, easily overpowered a full squad of Fire Nation guards accompanying Azula, he overwhelmed a group of four firebending guards accompanying Admiral Zhao within seconds causing Zhao to retreat in fear. Though not a feat of firebending even Zuko believed that Iroh could defeat Ozai in combat however Iroh said he could not simply to avoid harming his brother who despite all of the evil he has done still has some love from Iroh.3. One of the few firebenders that is able to create lightning, he created the technique of absorbing and redirecting lightning by watching the Waterbender's fluid movements and how they redirect the energy from attacks.4. Iroh is a very formidable martial artist being shown to easily defeat several guards without firebending.5. After spending time in prison he got back into shape effectively increasing his overall physical strength and increasing his physical stamina which would allow him to firebend even better than before. Also he learned how to firebend from the last dragons whose firebending skills are unmatched.6. Once Iroh notices Pyro's powers he will be wise enough to use defense instead of offense first allowing him to learn Pyro's weaknesses.This is a truly unfair fight for Pyro."