Here's a good write up for the specs on a skywatcher cf ota. Seems that the skywatcher has pyrex glass mirrors and baffles in the tube.
https://www.firstlightoptics.com/ref...newtonian.html
and one for the GSO
http://www.teleskop-express.de/shop/...n-Germany.html
Best to call the guys at Andrews and ask them about the differences they sell both scopes.