I just looked through my database regarding Jackaroo and BluDevill. Besides the similarities that can be spotted on PTR they also have:
- Wide EP-opening range.
- High and very similar 3bet% BB vs BU.
- Very similar squeeze %.
- Very similar turn delayed CB %
There are also some small differences between them but nothing major imo. Also, when looking at a hand I noticed another russian player, PPMascot. Not extremely similar to BluDevill and Jackaroo but enough to raise suspicion. He also has 1/2 SH as main game just as the other two.
As YOUGONNA.. mentioned their play does however not look very robotic but hey, this is 2014 so I guess anything is possible
I seem to remember Jackaroo sometimes doing some very basic chatting, but I guess that can easily be worked around.