Tom -
I'm not "into" thinning herds, but if I had to, I'd start with a complete list, and compare any two bikes from that list...

The winner would go up against the next bike, and the next, ad-nauseum until only ONE bike remained.

Then, I would repeat the whole process to select a Second, a Third, and so forth.

- If the winners were all one kind of bike, so be it: My gut would have spoken!