You get what you pay for. I would never fly any airline unless it is a national carrier and business class. I would rather not travel than be in economy, if I am not ready to pay business class. As to the service difference, well, consider that business class costs at least twice, sometimes four times as much as economy, so it is justified. Unfortunately, very few airlines offer champagne, most offer sparkling wine, and I am only aware of EVA (Taiwan) offering good quality champagne (Veuve Clicquot), the rest, such as Air Canada and Lufthansa, offer the undrinkable Drappier.