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For the Spider-Sense vs mastered Ryuusui Sekuiken battle.

In physicals, Spiderman's high feats, especially if taken literally in the form of narration, vastly outperform Kenichi's. I'm not an avid-enough Spidey reader to say where he's generally at.

But even if they are essentially equal physically, Spidey's web-shooting gives him an avenue of approaching a fight with Kenichi that I don't think he could deal with.