Don't know why I was going over this and the why's of it afterwards, but I may have some theory as to why the S's seem easier, comparatively speaking. During the majority of the other licenses, we are by ourselves on the track. There is no on track point of comparison as to where you 'are' in the test. That is why I find some of the cornering so damn frustrating and baffling, yet those in which there are AI in the test I find that it is easier to see when and where I need to drive harder, or change my gear chaNGES, or other such points where there is a need to make some sort of change in what I am doing in the test.
During the 'S' tests, I came to see, section by section and through trial and error, where I needed to be in relation to the AI at any different point in the test. Trial Mountain is a perfect case in point. If I wasn't up with the Porsche by the first right hander after going under the bridge then it was going to be more difficult golding. And so on, if you get my drift. Having AI in the test gave rise to a natural inclination to drive harder as opposed to trying to analyse and make technical changes in what I was doing in the tests. With you 'S's, you just drive the bastard as hard as you can and have some fun.