Both of those hats look like they were homemade. I am re-doing a few for my granddaughter now that she bought at the swap meet over the week end and I am just switching out the clips. Mine have no seams at all. One I am doing is a black hat that has hot pink dots on it, and the other 4 are a plaid.
The links you posted show seams and looks like the brim was actually serged on a serger.