I think it's generally accepted the strength Stat factors in everything from your physical to stat to how you do battle. It's not just how much you can lift. Case in point the most large men (including the Brutes in Hi shin unit) are arguably physically stronger than Kyou Kai but she low diffs them. At base value a character with a higher strength stat should defeat one with a lower stat. Especially if the gap is huge. Like Riboku can never best Ouki or Moubu in a duel.
Ouki and Renpa both have a 98 strength stat. That's enough for them in my opinion to challenge and defeat dualist with 99 and 100 ratings since Renpa and Ouki are the epitome of general weight. Ouki already was on course to defeat Houken and Renpa arguably has greater weight than Ouki.
Tltr. Ouki Renpa win since we know ouki's 98 ok plus his weight could defeat Houken 100.
Ouki and Renpa both have a 98 strength stat. That's enough for them in my opinion to challenge and defeat dualist with 99 and 100 ratings since Renpa and Ouki are the epitome of general weight. Ouki already was on course to defeat Houken and Renpa arguably has greater weight than Ouki.
Tltr. Ouki Renpa win since we know ouki's 98 ok plus his weight could defeat Houken 100.
I can see your point but ultimately Moubu and Kanmei will have huge weight too, so won't suffer unlike Houken. Kanmei has a military career as decorated as Kyou and Moubu is now the symbol of Qin. Houken has zero - even coalition Shin could cause him trouble.