I'm booking an award trip for my parents from DC to Paris. I have the option of using Lufthansa or United Business on the way there and Lufthansa or United First on the way back. Which of these airlines has a better first and business class product? I could probably swing this trip with One World awards through american or BA, though the dates would be less optimal. I also don't want to pay the fuel charges on BA. Just curiuos if the upper class products are worth looking into compared to the Star Alliance options. Any advice would be appreciated.