... He said the second paper was certainly not as straighforward as paper one.
He said it wasn't "harder"as such and nothing that he hadn't covered-it was just put in a different way.Maybe stuff that wasn't as "tutored?"
That does tend to be the case. Untutored children tend to find the second paper similarly difficult to the first, possibly because, being untutored, they're unfamiliar with any questions and by the second paper have got into the swing of things. Tutored children tend to know the 'question types' presented in the first paper, so may become flummoxed when coming across unfamiliar questions in the second paper. It may not help if they're overly confident having been heavily tutored.
Of course, really bright ones can often sail through both papers with ease, irrespective of tutoring or lack thereof.