On Fri, 19 Jun 2020 14:51:59 +0100, Dave Plowman (News) wrote:

It also depends how old the glass is.

Yep, old glass has lots of surface scratches than can divert the
cut.

New cuts much more easily than old.

They both cut the same, except old glass might not cut where you
want
it to. B-)

I was told there was more to it than that. Very fresh glass cutting more
easily than that in stock for a while. So not always to do with
scratching or whatever in use?

Maybe but it only takes a single scratch to divert the cut,
particulary if the angle between the scratch and score is small.

--
Cheers
Dave.