The Festool 6- and 9-gal Festool CT-22 and CT-33 are $490 and $530, respectively, everywhere I've looked. The 2.5-gal Festool "Mini" is $330. My 18-gal Shop-Vac 962-18-00 is $125 at my local Ace Hardware.

It's hard to compare spec's since they only spec max suction and volume and not a suction at a particular CFM. The Shop-Vac is spec'd at 65 inches of suction and 185 CFM, while the Festool is spec'd at 90 inches of suction and 134 CFM.

I would guess that the Festools would be quieter (72 dba ain't bad) while the Shop-Vac spec simply says "Quiet" (which I would consider a screamer).