Vinyl windows have had problems of various kinds in the past. So they now need confidence boosters like this to sell them. Will the company still be around in twenty years to replace them?
Both names you mentioned have made windows for awhile. Both are well known.
Not to confuse you more, if you are not convinced about one of these, you can also look at Alside, and Greatlakes. They are both window companies who make good products, and stand behind them.