I'll do research and try to find some more youtube videos. There are several videos of Dyson vs. Tandem Air Tacony uprights and/ or Miele S7. There also some of Orecks vs. Tandems and Mieles. There are videos of Royal Everlast vs. some other vacs. Many of the "VS." competition vac videos on Youtube from vac shops are common well known Big Box store machines vs. a Miele S7 or Riccar Brilliance. The Sebos are a high quality, very durable machine. Their cleaning is good but could be MUCH better.
I have no video available for a D4's airflow. I worked with one brand new out of the box for several months at a former house cleaning client of mine. The airflow for bare floor attachments and deep cleaning ability did not compare to Riccar 1700, Kenmore Intuition or Hoover Windtunnel canister that I substituted in on occasion to make my job easier and produce a cleaner environment. Yes the Sebo filtration and build quality is better than the Kenmore and Hoover but cleaning power on those machines made the job SIGNIFICANTLY easier, faster and more thorough. I have since dropped this client for better line of work and don't have to bring my machines along to cover the slack of her Dyson DC41, DC25 or Sebo D4.
