I own a 610SBK and the SOG Pentagon Elite II with Arc Lock.
Benchmade Rukus SBK
I prefer the Rukus outta the box. The opening is scary smooth and the lock is secure. It has the guard thingy which stops your hands from slipping to the blade during stabbing and the scales look/feel expensive as well as pleasing to the eye. The spacer pins (3 in total) are very nicely spaced along the spine and the liner thickness is thick, thus giving a nice firm rigid grip for me. It has grooves for the thumb on the handle and blade which feels good and not too abrasive. The clip is low and is not too tight so my pockets remain untorn. The coating on my blade is tough and my greasy paws do not smudge it too easy. The S30V steel is easy to sharpen and /was/is/will-be razor sharp for long time. The force which keeps the blade closed (detent?) is a little light and it is not strong enough for my opinion. As time goes by the Axis bar travels a little deeper but since the original position is fully into the shearing plane this is not necessarily an improvement. In theory the bending moment capacity is reduced due to the reduction in lever length.
Not Vision but my PEII which has similar Arc Lock
My Pentagon Elite II (PEII) had vertical bladeplay and the lock was difficult to unlock single thumb. The Kevlar Reinforced Zytel is cheap looking/feeling and there is no guard to slop slipping for such a knife which is marketed as a stabbing tool (not primary function) The VG-10 is nice but does not get as sharp as my Rukus. There is thumb grooves on the handle but it is nothing to shout about. BUT......
But the PEII's Arc lock detent became smoother over time and the vertical bladeplay disappeared over time. I deduce the lock bar has traveled deeper into the lock region due to frequent use and the lock sits more securely. Compared to an Axis lock (I own a Rukus and a 710D2) I know the Arc-lock is more stronger. The resistance to closing of the blade is not only resisted by a single bar of steel like the Axis but the force also transfers higher up into the pivot of the lock. The moving lock thingy is a solid, larger-than-axis-lock-bar, piece of steel and if under load (closing load) the failure would likely be (assuming the blade pivot holds) the shearing of 4 cylindrical steel sections instead of the Axis' 2 cylindrical steel sections. As time goes by the Arc-Lock definitely smoothens out and 'strengthens' somewhat as more and more of the lock 'pin' is in the shearing zone.
I hate the lack of screws along the spine. The spacers are only on the back and sometimes when I grip too hard the handle flexes. They really should include more screws/torx-bolts in the spine area. Like the CS Recons it is superbly rigid in the spine.
(note: The Arc-Lock's design is such that the 'pins' are always perpendicular to the knife due to the movement being restrained/guided by a rotating pivot. My Axis (though super smooth) has lock pins which does experience non-perpendicular movement and the tightness of the lock pin's screws caps as well as the tension in the Omega springs determine the non-perpendicularness of the pins.)
Conclusion
Unless you are planning to stab at car doors then the guard is probably not necessary, it hinders my cutting somewhat but is tactically better. The Arc-lock is the winner in the time category since the lock sorta improves over time. The blade of the Rukus is much better.
So if time and lock condition is your concern, I'd go with SOG. However do not discount Benchmade's great customer service, any problems can be rectified as long as you stay within the acceptable usage parameters. Price is also an issue since my Rukus = 2x PEII. PEII wins but the PEII is not being compared in this thread right
Go for the Rukus if you want something that'll be treasured and relied upon if you want a good looking/working tool. The lock is good enough but the price needs some reduction to make me happy.
HOPE THIS HELPS, SORRY FOR NOT TALKING ABOUT THE VISION, I ONLY GOT THE PEII AND I WANT TO HELP NONETHELESS...