The Festool vacs are optimized for dust extraction and filtration from small electric tools, especially with the smaller diameter hose that ships with the vac. If you need to move more air for general cleanup (I don't use my CT22 for that, preferring an inexpensive Ridgid unit that doesn't use bags for floor and car cleaning), then you'll want to use a larger diameter hose...and yes, you can buy and use a hose from the 'borg for that purpose.
--
The most expensive tool is the one you buy "cheaply" and often...