I'll start: Sonic's power level is generally limitless. If you've noticed something in the games it's that he doesn't really try his hardest oftentimes or ever get pushed to his limit. He holds back, because he doesn't seem to see the need to use his true power. Which is why I believe that he's not bluffing at all when he says he's faster than light. We saw a glimpse of the hedgehog's true potential in Sonic Battle as well where he pulled a logically impossible win over Ultimate Emerl, an entity who had all the powers of the characters combined into one. Sonic still won, because his power is too high. IDW's taken a different approach and seems to lowball Sonic a lot. He's basically a flat supersonic here because it's needed to make the plots work. That's technically canon so it pokes a hole in this idea. But, Sonic x DC is showing us his potential in real time. It shows us Sega's intent for the character, where supersonic isn't his maximum, but his baseline.