there is no contest, the Texas weapon systems is better; it is super low profile, so it is easier to get a sight picture/cheek weld than the ultimak,
I asked in another thread about this and so far have not got an aswer anywhere to substantiate this. My Ultimak rails are the same height or a tad lower than the top cover. How is the Texas Weapons System rail lower, if it sits above the top cover, unless you have to replace the existing top cover with a different one?
With the Ultimak, I get the "exact" same cheek weld as I do with my iron sights, and I get it quicker, and more naturally than with any rear mounted optic I've used. I also dont have a rear mounted optic back in my face, blocking my field of view.
I've already got marks on my shooting glasses from the takedown latch on the AK. The TX dogleg would probably break my cheekbone.
This would be my worry as well, as I'm a nose to (actually slightly alongside) the top cover shooter, which is actually the proper position for your head when shooting with iron sights. Same as with most other rifles of this type, including the M16 family of rifles.
No, becuase with the Texas dogleg, you mount stuff to the rear, FAR REAR, of the rail, so your face is not right up against the cover plate, and near the rear tang. Even if you just use a rear BUIS, this will keep your face away from the cover. This is one thing, that helps make it superior to many other site systems for aks; you can give yourself a normal type cheekweld, especially if you using a padded type stock or collapsible, with a raised cheekpiece.
You dont mount the optic to the rear if your used to and want a cheek weld thats close to your iron sight cheek weld, you want your head low and forward. At least thats the case for me. Even on my HK's and AR's, my scopes have always been mounted as low as possible and the eye piece of the traditionally mounted scope, at, or as close to, the same place the rear sight is or would be. It makes for a smooth, natural transition from iron sights to scope, as there is little if any change in how you shoulder and shoot the rifle.
Things that bring the scope higher, and more towards the rear, do just the opposite. They also make the gun less user friendly when used as a "working" gun, as opposed to a "bench" gun.
And that is the reason I like Nato length stocks and not the puny Warsaw length that most AK's come with.
The standard AK stocks have the exact LOP (13") as most combat stocked rifles, including the M16/M16A1's (the A2's are 5/8" longer), M1's, M14's, HK, etc. The stocks are not "short". Adding length to the AK's stock only hinders and interferes with its use for anything but a bench type rifle.
I've used both rear and front mounted type mounts, on AK's, as well as other type rifles. From the standpoint of an all around, working type gun, there is nothing faster, and more natural to use, than the forward mounted optic, and especially a quality red dot that is cowitnessed to the iron sights.
The Ultimaks are simple and rock solid. They have no moving parts to break or come undone. They are also the lowest mounted rail you will find on an AK (unless the TWS type mount does lower the top cover somehow, which I havent seen so far). The Ultimaks are aluminum, and dont retain heat, and actually shed it quickly. They are also lighter than the handguard they replace, so they really dont add weight to the gun by themselves. Even with a reasonable dot sight on them, they do not add much to the weight of the gun, and balance and handling are not at all affected. The sight is up front, out of the way of both handling and your field of view. It allows for fast, natural shooting, same as the iron sighted only rifle, and you can snap shoot both static and moving targets easily at most any range.
after 20-30 minutes of mucking with it, i've got it pretty close...but now I notice that it is not only 'crooked' relative to the front sight, but also not centered over the bore line - it goes too far over the centerline and ends up 2-3mm too far to the right side of the rifle when mounted. After hearing good things about the BP02 here, I am just frustrated and dissapointed; this isn't a useable mount for my AK74 built on an NDS2 receiver. I guess now I can try one of the other 2 listed here and see if they are any better; the finish on this BP02 scratched pretty deeply where the lever passes over the mount itself, so I doubt I can send it back now 
