Okay after a while the other bucket I setup with the Dust Deputy started collapsing. So I switch and put the HD DustStopper on the bucket and scrolled the rest of the night wit no collapse problem. This tell me the Dust Deputy creates a lot more vacuum in the bucket than the HD DustStopper. The Dust Deputy also separates out a lot more dust than the DustStopper does. As far a keeping debris and dust from going to the vac, the Dust Deputy, wins hands down as far as I am concerned, but the DustStopper does a fair job which is a lot better than none.
In the near future, because I am having fun experimenting with this, I will buy some PVC part and put in a "release" valve and see what happens. What I think will happen is with the release valve in place, I will reduce the vacuum created in the Dust Deputy and reduce the amount of dust/debris it separates.. It will also probably increase the air noise of the setup which I do not want. With the Dust Deputy a second benefit I noticed was it was less noisy than the Dust Stopper set up. No meter test or any thing scientific, just what I thought I was or ah, wasn't hearing. This means it will work no better than the DustStopper and all my fun will be done for not!!
P.S. Just to wanted to state also, I am using a Fein Dust Extractor, not a shop vac. It is made to be hooked up to tools to extract the dust and run with the tool. I use my shop vac for vacuum the shop floor. The Fein is pretty much dedicated to my scroll saw and my belt/random orbit sander when I use them.