As Blackjack stated, in lieu of comparing products or jeeps. It should just be stated what the geometry correction does and then leave it up to the reader to determine if it is beneficial to them or corrects what they need corrected within their constraints (budget, ability, availability, etc....).
Just look at the physics,
Lifting a Jeep 4" and utilizing the same frame and axle mount locations, definitely changes the anti-squat, and may have an affect on the rear steer. This is because it raises the point of intersection of the two control arms up and aft. This is a fact.
Having a higher AS can force the wheels/axle to walk under when on steep steps and this is what is commonly referred to as bouncing (walk, loose traction, walk). Rear steer is during articulation when one set of links is pulled forward and another is pushed aft due to being in different parts of the radius. (I don't think I ever felt rear steer in my jeep, but I am guessing it is felt during hard acceleration on the road when the body rolls and the body roll is effectively articulation and causes steer AND in rock crawling when you pick a line and due to articulation of the axle it drives slightly off that line?)
There are other issues with 4" lift with stock control arm locations; lifting wheels due to moment induced into frame by control arms and the location of the force applied above the CG, etc... but I am just going to focus on the above to simplify for this post.
Now does this higher AS and rear steer, or whatever issues you may be experiencing affect you enough to want to make a change? If the answer is yes, then analyze what changes can be made.
The geo correction referred to in this thread, relocates the control arms to make them flatter and reduces the anti-squat, this is a fact, if the line of intersection is further forward and down due flatter links, then the AS is reduced, it may also reduce the rear steer by pushing the point forward and reducing the fwd/aft movement during articulation. It also reduces body roll by raising the mounting point of the panhard on the axle. This will reduce body roll and may also reduce rear steer. This is a fact. Is there any negatives to this modification, yes there may be limitations to up travel due to the height of the upper control arm mounts, your current frame side lower mounts may be beat to hell and you can't redrill this side, etc..... Then there is the cost and effort.
Compare the benefits to the negatives, does it address your issue, is it in your price range and ability. Will it completely address your issue or just "make it slightly better or less noticeable" and if so is this acceptable to you. Then make a decision. AND YES definitely compare to other methods/products which may not only do the same thing but provide additional benefits at a different cost and ability level. Key thing is to choose the method/product which addresses your issue within your price/ability range
. I'll run my short arms with no fancy brackets.
