Great Question! These are both two great vacuum cleaners. We actually would recommend both! I would personally tell you that it is going to have a lot do with your preference for uprights vs. canisters. If you prefer uprights, Sebo is your choice, if you prefer canisters, Miele is the best. But it sounds like from your question that you really don't have a preference. I think probably the best way for you to decide, is as a general rule, homes with a majority carpeting would be best suited with an upright, and homes with a majority of bare floor's, canisters would be suit it. has wonderful video demonstrations of both the Miele S5281 Callisto and the SEBO X4 Vacuums for your viewing pleasure. These videos should most certainly help you make a decision on which vacuum is best for you. Hope this information helps.