Cell is far from destoying solar systems and hes far from being on Pyrons level of power. Pyron is on Galactus level or maybe greater, Cell doesn't stand a chance. Pyron is a living being comprised solely of energy. With his powers he seeks to rule the entire universe, absorbing planets energy and conquering them one by one. His blazing body can melt the milkyway and burn the planets to ashes in an instant. An alien from planet Hellstorm. After evolving over many years, he became a cosmic being. Over the time of 200 million years, he sought to collect beautiful planets (bored) by consuming them. To know more about him try playing the Darkstalkers video games. SSJ4 Goku could barely beat a Nova Shinron whos no where close to being hotter then Pyron. In darkstalkers #6 Pyron was just floating in space and he wasn't that near or trying to melt the planet earth; and the thing change the tempature around the world.
That also comes down to a question of what happens when and what the different between Physical/Energy attacks strengths are.For instance prime example Vegeta attacks Perfect Cell and lands a kick that barely moves Cell head and doesnt make him stop smiling later he uses Final Flash convinces Cell to take it head on to prove his strength[gasp a non-retarded move by Vegeta] and it ends up blowing his arm and part of his torso off.This shows theres a difference between Physical and energy attacks in the series the question is how much.There are also moments where charcters have taken extremely powerful attacks [past the "Destroy planet" level which starts in the Saiyan Saga] entierly physically especally in the Frieza Saga.The only reason we see less of this is because we get regenerating villians and im guessing everyone figured out "IF theres a cloud of dust hes not dead".Theres also the uestion of how much "Being on guard" matters since Vegeta has shown at least a couple examples of hurting people stronger than him when they werent ready [FF on PC and KOing SSJ2 Goku after "Calling" their fight]
__________________ Coolness rating-Rakushun>Canti>Taishi>Kenshin>Gohan>The Chainsaw of Natural Selection>All>DB:GT
Yeah but SSJ4 Gokus strength is more on par with DB characters.He couldnt have beat most of the contestants in the later Budokais let alone a character of any signifgance to DBZ
__________________ Coolness rating-Rakushun>Canti>Taishi>Kenshin>Gohan>The Chainsaw of Natural Selection>All>DB:GT
Thats because they go by power levels, once somebody is stronger in that series the other person doesn't stand a chance. And he had to charge that attack to do some damage not to mention Cell let him do it.
No hes not. He even tells General Rildo that hes even more powerful then Majin Buu. I don't think GT is better then DBZ but you can't dismiss it because it's part of the story.
Actually its impossible for it to be part of the DBZ storyline because of lack of AT and the plotholesIts more along the lines of Tenchi in tokyo being compared to the OVA where there was a pretty massive difference in the characters strengths despite similarities.
If GT is part of the Storyline then Various fanfics online which have things ranging from krillian beatting SSJ3 goku straight out to Pan getting a female Saian transformation where she grows a penis [Super-Futa-Jin] and then beats down and gives a rectal exam to SSJ4 Gogeta with her "Round warm heated instrament" should count too.The only difference is they didnt have a mountain of cash to give AT for the story he was tired of making
as for "Speed of light" its not really calculateable how fast the characters go.We are never given actual speeds other than Kid Goku saying he could run faster than most of Bulmas vehicles early on after that its just gets faster with no real compairson besides'Im faster than him".Id probably not put them at Light speed levels but they DO raise pretty high since they could do Flash style after-image tricks pretty early on [But definately not Lightspeed]
__________________ Coolness rating-Rakushun>Canti>Taishi>Kenshin>Gohan>The Chainsaw of Natural Selection>All>DB:GT