A friend of mine pointed out today that the windscreen which Autoglass fitted is from a different manufacturer to that the side windows.
How can I tell if the windscreen which was fitted by Autoglass is an OEM part or whether it is an aftermarket part? If it is an aftermarket part would this make a difference to how the windscreen fits?
The windscreen they fitted is manufactured by Pilkington and the side windows (which I assume are the original ones) are manufactured my Starglass. After doing an internet search for Starglass I am unable to find any information on them.
Any clarification anyone can provide would be much appreciated.

Cheers
Gail