Is there a source stating that they are pulling out? in that case I'll buy a couple of uniTanks.
In regards to your question, no they're not. I just checked, as I have both a Jobo 1510 and a Paterson System 4, both purchased last year. The center rod on the Paterson is too big for the Jobo reel, so it might fit with a little bit of sanding on the rod, but the reel seems to fit fine.
The Paterson reel is a tad too big for the Jobo tank, that one I have serious doubts that the sanding will help. Keep in mind that the interior diameter of the Jobo tank is slightly larger at the top (probably for housing the latching mechanism on the top cover or something like that. And like mentioned before, the Jobo rod will be slightly loose on the Paterson reel,but not by too much, you just can't get the reel inside the tank.