I wouldn't say they are recommending Paradigm over Gorell. Rather, I think the sales rep. was looking at this as the most affordable product for a person's first home in need of windows.
Yep, we were one of those Schuco over Gorell purchasers back when the Schuco name was flying as number one over all the chat lines. Schuco was offering triple pane at the cost of double to get into the local market. Hopefully (after four years), our Schuco windows will continue to do well.
Post or read through reviews of replacement windows and fenestration products.