Initially I would have said no, but after taking Philosophy and Global Politics and primarily having had full confidence in my cohort, I realised how difficult it was. I go to a select-entry school, but in both subjects we didn't do really well. My SS was the highest for Philosophy and the 2nd highest for Global Politics, which was pretty disappointing because I really thought my cohort and I would have done better.
I've personally noticed that in such humanities subjects, private schools seem to have the advantage. I'm guessing they have better resources? I don't know, but I'm going to say yes. Think about it - when it comes to such subjects, only people who are interested in it are going to take it as opposed to something like English where you essentially have to take it. The competition is harder, and there will be schools who have access to better resources. I did love my teacher (taught me both Philo and GP) but he didn't give us any external resources and we pretty much had to solo it, so I'm thinking for small humanities subjects, it does help to attend a private school or a school known for owning those subjects haha. Just my two cents/personal experience