87 K5 Rear Slider Glass is broke (What is SOFT RAY NEUTRAL)

[stano]

The rear pass side slider glass is cracked on our K5 and I was at the Salvage yard this week end and saw a blazer there. Looked at the window and it looked good and It said SOFT RAY, so i pulled it out and it cost $35.00 for whole window with rubber. I was happy until I got home and held it up to the window in the truck and notice that the truck window looked darker. And it said SOFT RAY NEUTRAL. So what is the deal. Do i need to find a different window.

thank you
87 K5
stano