Stop disrespecting the author tosh!!! Toriyama clearly says that Krillin is stronger than Tenshinhan (the official name)!!! Bias is the catalyst for impulsive statements!!!!!!!!!!
Everyone is capable of performing the Kienzan, so Tienshinhan would simple strike him first, thus ensuring his victory and proving why my opinions are write in the first place.
I honestly don't know, people wants to say because Ten is always training but I find that to be meaningless because, one Ten has no feats following the Saiyan arc so how strong he's become is really up in the air and two Krillin is stated to be stronger by several sources (BOG promo material, Yamcha, AT, etc)without anything contradicting it. Some people even go as far as saying Ten isn't human when the same material that implies that lists him in the "Earthling" category anyway.
Maybe it's cause Krillin really hasn't done anything useful since the Frieza arc?
And I mean Tien has constantly been shown to be above Krillin since his debut in dragon ball :V
Honestly though, I don't know why people rate Krillin so high, to me even Yamcha is more impressive than he is
The actual purpose of the Z-Sword was to release the Old Kaioshin, so I would not place too much emphasis on Katchin besting the sword. There should be no actual reason that Katchin would not be cut from a Kienzan.