The Enhanced Modular End Cap System might look similar, but there are huge advantages to installing this bad boy.
The Enhanced Base includes a spring-loaded ball detent that pushes against the compact action of your choice, so while the buffer system is gone you still get the same spring-loaded effect of over 7.5 lbs on your system. This little bit of take-up goes a long way, allowing you to maintain no slop in the action knowing that your system is pressed snuggly forward like originally intended.
Enlighten your Senses and Trust the Sensei.