There are not a lot of different brands out there. Romani has the ClipperVac brand http://www.clippervac.com/
Hanvey has the Taxi Vac http://www.hairvac.com/
Laube has one, and the Scissorman (I think) has an attachment for a shop vac.
I think they are all about the same really. A few differences that I know of are that the Taxi Vac empties from the bottom, it's mean to hang up, while the ClipperVac empties from the front. The suction adjustment on the CV is at the clipper itself and I think on the vac on the TaxiVac.
I don't know anything about the Laube one.
I have and have only used the ClipperVac Tote. I love love love it and wouldn't want to have to groom without it.
If you don't go after what you want, you'll never have it. If you don't ask, the answer is always no. If you don't step forward, you're always in the same place.