I do remember the Happy Cooker grill, and have a few in my collection! Not sure what happened to the company but they’re not still in business today. Maybe Weber put the kabash on them or just had a better marketing and sales team. If I recall the basic material was very similar, same gauge steel, same weight and both had a strong porcelain finish. But I do like the Weber kettle better, especially the handles, vents, ash removal, and lid were built better with less fasteners to rust and fail.
Additionally, I never could cook on the Weber wok, think there have been 3 different evolutions. The original steel in 3 sizes, then a flattened version made of aluminum or some type of lighter metal, and then the cast iron version in the gourmet bbq system. Having so many cooking options like the wok has helped the kettle stay relevant throughout the years.