yeah there are a bunch of posts on snipershide about the new bipods. i can't recall their name or i'd share it. seem pretty cool though and well reviewed (but then, everybody over there seems to be stepping all over themselves to suck up to the newest vendors.)
pb, because the atlas can be positioned lower to the ground, and i like the pan feature. the tilt is not so great, so you have to mess with the leg height more. but deploying it takes forever compared to harris and i have to come out of position to reach it and if i don't guess the tilt of the terrain right, i usually get into position, realize tilt is wrong, have to get out of position and fix it. takes a lot of time.
also, the harris legs are wide and solid and pointing straight forward when in the up position so if your stock forearm is round you can rest the harris legs on barricades etc if you need the space. ime, the cant and pan are fairly loose on the atlas, which i think may be addressed in the PSR model but not other atlas models. the result is, when you go to throw the rifle through the port the atlas legs are usually pointing 30+ degrees off center in some random direction, and are pretty narrow and don't feel as stiff. it's just harder to build a position. and if you have to go from prone to a window, back to prone, back to a window on the clock, forget about changing the atlas between ports.
net, if you've got all day to set up for a good precision shot, the atlas wins. if you're on the clock, i still like the harris.