These exams do seem to be harder, on balance.
Though not everyone has found this, all of the science-based subjects certainly seem to be!
I think that this is probably because they seem to require a different set of thinking skills, which we'll all just have to adjust to, I suppose.
As regards UMS, it's mostly a 400-point A-level now (200 at AS, 200 at A2), but for subjects like maths and some languages, special conditions apply until further notice.