Windsor Design is an interesting brand in that it is not actually its own company. Instead, Windsor Design is one of the in-house brands sold by Harbor Freight. While it may be a store brand, that should not dissuade you at all as Harbor Freight is known for selling some of the best products available for all fields of construction. Granted, this may not strictly be the best table available, but it does provide a solid mix of features to make it a good value.
Grizzly is a company currently undergoing an upheaval. This brand was once known as a manufacturer of professional grade tools and equipment for woodworking products. Though, in recent years, that reputation has begun to slip a bit since being bought by the Chinese company SIEG. These days, whether the Grizzly product stands up to its previous standards of excellence often has more to do with what you are buying than the company itself.