The little one is called the Big Shot. No pro. The Big Shot
Pro is only the big one. Believe me, I go to a board where there is a big huge focus on the Big Shot and the small one is not the Pro and anyway, why would she compare the 6" Big Shot to the full size Go? Of course the small one is cheaper-it doesn't cut nearly as much as the Go does.
If you go to
sizzix.com's machines page I guarantee you that the smaller Big Shot is just called the Big Shot (or the Big Kick in some places, or the Big Shot Express for the electric one) and any with the word Pro in the name is the 13" one. And I know you can't find the big one for $100 but the previous poster said she could so I would love to know where.