I have both. The CT22 and the Fein II older design. I wear ear protection pretty much all the time so not a good judge on the volume. For use with tools, I have been really happy with Festool for dust collection. If shop cleanup is the primary use, I think the Fein is better because of hose size. Both have been very reliable. Last I looked the pricing was getting closer together too. If I could only have one and was sure I would only have one Festool machine, it would have to be the Fein. I bought the Fein first and ended up with both. So I imagine, I have been little or no help.