Im not saying you are retarded but the discussion tends to it.

Like jack said.
[quote ... some individuals will bite harder than other individuals ... and that is it.[/quote]
And some tosu's could win over pitbulls and some not.

I don't think any serious dogman would contract his dog with a tosu. So it makes me wonder what quality the dogs were that matched into them. I wouldnt think it had any value when mine would win over one. Just a stupid risk of harming a dog in its prime which could spend its time training for the real deal.