You only notice the lack of Ackermann geometry in the SD/PPE centerlink when you are turning sharp at slow speed. Ackermann is the geometry of the front end which causes the inside tire to turn sharper than the outside tire, and all cars and trucks have it from the factory to improve turning radius. The straight centerlink gets rid of it, and both tires turn on the same arc.
If you have over 500rwhp, and you want to race or sled pull, it is your only choice. Cognito braces are good, but you will exceed their capabilities with big power.
Casper has the SD Centerlink and launches arrow straight. Blue has the Cognitos because it's turning radius already sucks, and it is right at 500hp. We do get a little dance with it when launching hard, but nothing scary.