The ones Packard Woodworking sells are a little less expensive. I'm sure the Sorby scrapers are good tools*, but for a scraper I don't think the brand name is crucial (assuming it's a decent quality tool and not cheap Harbor Freight stuff). Regardless of the brand, definitely go with the 3/8" (or thicker) over a 1/4" thick model.
*Sorby makes fine tools, but you pay a premium for the "Sorby" name on them. I've yet to see a case where an equal or better tool wasn't available from a different maker at a lower price.
When the going gets weird, the weird turn pro. - Hunter S. Thompson
When the weird get going, they start their own forum. - Vaughn McMillan