Protoman is definitely a super strong navi! He’s showed many times in the past that he can take on Megaman and even defeat him at some points! At his best Protoman is well over Mach 5 and is probably faster than light! Of course Megaman is no pushover either, with one Hubstyle blast he could probably take out the planet!
So both of these guys are extremely powerful and shouldn’t be messed with. I’m leaning on Megaman in this fight. He’s been shown to be faster and stronger than Protoman when the chips were down. Megaman’s just stronger in the end. Megaman wins.