Fiberglass + carbon fiber stick vs. all carbon fiber stick

[200KG8 0]

I am shopping for a new stick (specifically looking at the Jetspeed Pro and the Jetspeed 370) and I see one listed as 12k carbon fiber construction and the other listed as carbon + fiberglass. I know fiberglass is cheaper and heavier than carbon, but what else does it change on the stick besides price and weight?

My last two sticks were an EK40 and a Tacks Vector Pro... I'm not sure if those were all carbon fiber or carbon + fiberglass.