Picked one of these up over lunch at the local Target (using the DPCI trick of course).
The Gray Clones are definitely the Jetpack Clone, like the guy from Scum said, they still have the hole in the back and a total lack of good articulation in the arms.
Also, from what I can tell without totally destroying the packaging, there is at least one extra gun (small blaster) included in the plastic tray - in order to get it out though, you have to remove the "Gunship" cardboard from the plastic bubble (the "gunship" is glued/taped to the bubble).
You will see what I mean when you open it, but suffice it to say that it is going to be hard for anyone who wants to keep the packaging nice after they open it - you pretty much have to partially destroy the great presentation to get these guys out of the package. Be forwarned, if you want to take them out then put them back in the box for display, be VERY careful when removing them from the bubble...
I'm at work now, so no pictures, but I'll try to take some good shots tonight when I get home...
Jeff