which version of madara the latest one or the old who fought the 1st hokage
the lastest one with the rinningan would beat killer because madara can't be hit by techniques and by the time killer bee finds a way to overcome it it would all be over and on top of that technique he has sharingan,ms,ems,izangi,1st hokage dna ,teleportation and i think he still has the sealing jars and probably many other unique and great powers
killer bee dose have sameda but if he can't hit the target theres no use for the greatest shark sword ever made same thing with the tailed beat ball unless killer bee is really smart and was joking about the rest of the time then maybe his chances would increase quiet a bit but hardly doubt he was just joking also he even admitted to being an big idiot along with naruto maybe if he had some1 say like itachi along with him then the odds of them winning would increase also would be one heck of a battle to witness (luckily he dose in the manga alongside with naruto)
i have a theory that madara has done something to samehada that will make it go against its wielder the chapter when we saw kisame killing his sensai and obtaining the sword