eco/business: for these flights the seats are the same but chances are better for a free seat beside you - and drinks and food (in business a bit more than the simple eco-sandwich). With Swissair ou change in Zurich (in business you can use the business-lounge), with Austrian change in Vienna (longer flight, also a business-lounge) and with Sabena you change in Brussels (also longer flight and business-lounge). Swissair is ratest highest among these three (but it doesn't make a big difference), and four your itenary it is the fastest (MUC 0950 - 1050 ZRH 1220 - 1550 AGP). One ore advantege for business: kg-limit 30 plus better tolerance for overweight (eco 20). But may be you like VIE as anairport better then ZRH (some do).