Would be nice to get a real answer here instead of the snyde remarks...
Two Gold PSUs are a very cost effective way to setup a mining rig, 1200w PSUs are very expensive.

So, let's try this again...
The Add2Psu as I understand it will turn the 2nd PSU ON AND OFF in sync with the first.
The interconnect cable may only turn PSU #2 ON, but maybe not OFF?

I haven't tried this yet, just about to setup my rig and I want to use the right part for the job.
Don't bother replying if you have nothing useful to add.