The other Comp Plus' that I have here all use bushings on both ends. They come with plastic but I always switch those out for bronze. So it does sound like there is a difference. Odd that they charge another $100 just for that.
I'm willing to bet you can drill the levers for the trans to accept the outside diameter of the bushings. The inside diameter already slides onto the rods, they just don't fit into the levers on the trans without drilling. That's how the original OEM shifter is on my Z. I'm just reluctant to drill on the factory stuff. But I wouldn't hesitate to drill on the aftermarket kit
So even though they don't have bushings on the trans levers, it wouldn't take 5 minutes to correct that and saves $100 from buying the other Comp Plus....Just a thought.
I hope that explanation above made sense.
Just to add to this, I'm sure you're aware, the factory OEM doesn't use any bushings on either end. The shifter housing end has impregnated rubber for the rods which even when in good shape will still give a mushy feel. That's part of what my wife is complaining about. Even modifying bushings to fit the OEM shifter without modifying the shifter in any way was a lost cause.