Slightly harder is an understatement. Problem with the practise portal – apart from not being as difficult – is that the content started to repeat, so it had limited utility after the first couple of practice sections. Also, the actual test is adaptive, so in a way, take it as a good thing that it got progressively harder.it was slightly harder, I thought I did well but clearly did not practise the enough (I did all the prep tests multiple times lol)
Also, don't be so sure that you didn't do well on the tests. They mean it when they say they take into account your whole application. Like, I think back to my application last year and I'm amazed it wasn't tossed faster. It was completely non-specific and for one of my answers, I don't think I even directly answered the question.
So you know, ultimately, this whole process is extremely opaque and abstract. We don't actually have any idea how they make their decisions. Some firms put more weight on this, some more weight on that. Maybe you got unlucky in that your application was reviewed later in the day when they were tired – or even reviewed by one member of the team instead of another.