When choosing between Whirlpool and Sunpentown, Whirlpool is generally the preferred option. Whirlpool is a well-established brand with a strong reputation for quality and reliability, while Sunpentown is a newer entrant in the market. According to a survey by Consumer Reports, Whirlpool appliances received higher ratings for durability and customer satisfaction compared to Sunpentown. Additionally, Whirlpool has a wider range of products and more extensive service networks, making it easier to find replacement parts and professional repair services.