There seems to be a lot of FUD (fear, uncertainty, and doubt) cast in the finest microsoft tradition. So I though I'd weigh in on individual points further since I OWN both vacs.
I would guess the CT-MIDI bag is larger than the Fein.
Absolutely not true! Why guess and generate dispersions and misinformation? Here's a pic of both bags. Any doubt? The Fein canister is substantially bigger - the bag conforms to the larger volume even with the filter.
As Anthony points out the Fein's capacity is deceiving, the turbo II and the midi are closer than Fein would have you believe. I don't know what the Fein's capacity is or how much the filter bag can hold before suction is reduced. I know the Festool is up front with the real capacity of the mini/midi.
Odd statement... How is it deceiving since you don't know what the capacity is? Are you suggesting Fein is not "upfront?" I have not found that to be the case.
I don't know what the Fein's capacity is or how much the filter bag can hold before suction is reduced.
Well, here's a real data point. With my Fein bag about 75% full, the suction is still greater than the Midi.
Plus the Festool vac filter bags can be stuffed almost solid and you don't really notice loss of suction. The Festool disposable filter bags hold up well and can be reused. I can't comment on the quality of Fein's filter bags.
Three things give the Festools vacs a real edge.
If you can't comment on the quality of the Fein bags, how is the conclusion reached about the Festool vacs having a real edge?. Just an FYI, the Fein bags are great quality and can be reused (if one desires, but I don't have time for that). You can also use PC 7812 bags in a Fein vac. This comes from real use, rather than on speculation...
If you already have a Festool dust extractor, you will find the 'logic' of the auto-switching different on the Fein. Potentially dangerous as the socket is sometimes live when you don't expect it.
Hmmm... Owning both vacs I don't understand. Being an engineer (electrical), when it comes to shop safety in concert with potential catastrophic results, I don't trust any switch. That's why I unplug my tools when I change blades, bits, planer knives, and nuclear triggers.
I've used the Fein and the long hose is both nice and a PIA.
I just wrap it around the vac - the handle is, well, very handy...
The antistatic hose is a plus for Festool, but some people like the Fein hose (non antistatic) better
Yup, and I like the greater suction of the vac as well. Static isn't much of a problem here...
One more thing, the wheels on the Festool vacs can ware and possibly scratch floors. Festool sure rethink the wheels on all of their vacs.
Hmmm.... The Festool wheels and wheel frame are hard plastic. The Fein wheels are rubber held within a metal frame. Much softer on floors. Here's a pic. I also like the Fein clasps - their metal. Rather than the plastic claps and hinge pin on the Festool
One last comment from me. I lent one of my Fein vacs to a neighbour, he was refinishing his floors with an ETS 150 sander. After some time the dust extractor generated so much internal heat the Fein orange container became soft and sucked in on itself.
I'm surprised on that comment. Perhaps he didn't use a filter bag and the canister became packed? Did he vacuum up a lit cigarette butt and cause an internal fire. Isn't speculation wonderful... Did a search and found no other mention of that occurring. I've used mine for 7+ years including home remodeling. It's robust and runs cool. It's two stage bypass cooled motor is a big bonus.
On HEPA, yes, I'm a fanatic. HEPA specifies a 99.97% collection of particles 0.3 micron and greater. A generic 1 micron filter has no collection spec associated with it. What is the collection; 99%, 80%, 75%? Others can speculate, I'm not into that.
The Fein II is a much more robust vac than the Midi or Mini. Now, with the CT-22/33, my conclusions would no doubt be totally different.
Just an FYI, I'm not trying to pick on anyone, or Festool, which is an outstanding tool manufacturer - I love their tools. It's just from some of the above statements, it really seems the comments are based on speculation and FUD rather than day-in-out ownership.
Hope the above is useful to somebody...