I don't have an answer for you. I know CAT rebrands Snap-on and Williams stuff, and the angle wrenches used to be Snap-on rebrands but I'm not sure now. The only CAT tool I own is their rebranded Williams ratchet screwdriver which uses Snap-on's internal mechanism.
CAT does a terrible job of communicating anything when it comes to their tools. Their listings are either hidden behind account walls or the listings tell almost nothing about the tools or the prices. After doing a few quick searches, I couldn't find a pdf hand tool catalog for them either.
All I could find after a quick search is that the set you are thinking of buying is CAT part number 233-1636. Here is the listing for it.
Cat® Large Angle Wrench Set (7 Piece)
parts.cat.com
Maybe someone on GJ with a CAT account can use the part number to find more information for you.
As a side note, I'm not a huge fan of Tekton, but I noticed they are now making and selling USA made angle wrenches. I don't know how they compare to CAT, Williams, or Snap-on quality wise, but they are 30/60 degree wrenches like Snap-on (which is hard to find). The same set you are looking for would cost a little under $200 delivered from the Tekton website. Maybe someone here on GJ knows more about the strength/quality.
Featuring 30- and 60-degree open ends to maximize access angles. Engineered for an advanced range of motion, optimized strength, and exceptionally lean profile.
www.tekton.com