AS-level vs A-level

So I'm in Year 12 and currently revising for my mocks. For physics I've just been doing AS-level past papers (as I'll be doing 2 AS papers for my mocks), but I was wondering what the difficulty is like compared to full A-level exams? Like half the topics in AS obviously get examined in the A-level too, but for those shared topics are the questions noticeably harder for A-level compared to AS-level?

Thanks :)