I have worked in recruitment for 2years now.
Humanity degrees are becoming more widely recognised as a harder degree, due to the transferable skills. You are not regurgitating info, you are not ticking boxes or answering one word answers- you have to interpret information and write coherent essays using information you've selected and back your own argument up.
It is generally harder to get top marks at these degrees due to the fact that it is quite subjective...at my Uni the highest you could get in an assessed essay was 85.
I studied humanities and sciences at A-level, got A*s in the humanities and A in sciences, I revised less for chemistry and physics because it was much easier to learn.
Getting an A* at English literature is quite difficult due to the fact that you have to present new knowledge or original ideas.
I'm not knocking anyone who did science, but I have turned away individuals who got A* in sciences for those who got A in humanities/arts because the science ones don't really know how to think for themselves, and their written communication skills are not great...interpretative skills which you can apply to areas you are not familiar with is what I look for.