Bakugou fights in a mid to close quarters fighting style, if Knuckles ever Starts beating him in CQC he can and will likely just start throwing out explosions from a distance, and knuckles BFR requires him to get Bakugou through a ring which is unlikely because Superhuman vs Class 5 is an unfavorable matchup for Knuckles.
He has AP auto canon, which when combined with dura neg explosions, creates a whole new layer of trouble for knuckles, having to go though a full barrage of attacks which will all do serious damage. AP shot will go straight through any defense he may have, his hero gear gives him access to grenades for set ups and distractions, his gauntlets store up sweat to be released as one big kaboom, even his kneepads are essentially just Blunt weapons to increase striking damage.
He has flight, flashbangs, catapult moves, a much more strategically thinking head, many more combat skill showings (Bakugou has fought against people who have years of experience on him, and easily skill stomped criminals with at least one likely having a decade of experience, and is equal to, if not better than Deku, who was nearly equal to people like Wolfram, a mercenary directly hired to kill the Top Hero, and held his own against Stain, who has killed multiple pro heroes, and held his own against them all, despite the decades of difference, Knuckles has training and time guarding, but he’s another punchy fighter, which Class 1-A has many of, while I doubt Knuckles has ever faced a foe quite like a Bakugou before)
So yeah voting Bakugou