If you're talking about topics, there isn't much change actually
except that in emaths now there's vectors,sets and matrices which
were previously in amaths (correct me if I'm wrong).
As for amaths, there are new topics like partial fractions,
angle properties of circles (intercept theorem etc.), higher level
of trigonometry & differentiation. (Sorry but me myself ain't
sure which topics are taken from which, I just follow what the
teacher teaches :P)
But the main difference in emaths I can see is only that now
both Paper 1 and 2 we can use calculators, the format of questions
seem to be the same.
As for amaths, there is no more either or question, meaning all
questions are compulsory. Unfortunately, it means that if the last
10 mark question is a topic you're weak in, all the best.
Nevertheless, format of questions seem to remain the same.
I hope it helps at least a tiny little bit ><