This might be interesting...
no prep , in character , Round 1 - early series , Round 2 - Mid series , Round 3 - end of series , speed is equal if there is a problem ,inuy knows that all of harus power comes from his sword
Round 1 - Inuy has no sword just his claws and Haru has sword no explosion
Round 2 - Inuy has his sword with more then 2 attacks he knows and Haru has Form 2, 3 and 4
Round 3 - Both have everything they got in the series ( If there is a sword that haru has that has some sort of hax then he does not get it)
Bonus Round - They are both blood lusted
Location - Inu no Taishō's tomb
note - no hax if possible