The link is subscription protected I think.
It didn't say much really. They compared the Cayman to the Lotus Elise Cup 220, the Audi TTRS and the Alpine 110. They said "the Lotus and the Audi are worlds apart but the Alpine and Porsche join the dots between". The Lotus is basically a track car with no creature comforts but is a lot of fun to drive, while the Audi is basically a very hot hatch - which is given away by its driving position - and lacks "driver involvement" As an ex-owner of a TT I'd agree that the problem with the TT is that you sit relatively high up and the controls are too far away (unless you're short). That's always the problem with front engine hatchbacks - you don't feel part of the car. Mid-engine cars always put you at the centre.
The Cayman won because it has the best chassis and suspension and is a "better ownership proposition than the Alpine" - i.e. German engineering is better than a low production French sports car. It's also more practical than the Alpine. And they say that "Not even swapping the charismatic six of old for a flat-sounding forced induction four can spoil the Cayman. It handles better than ever and is one of the world's most talented sports cars".
The most surprising thing to me is that, when you look at these four cars, the Cayman is also the cheapest - in the UK at least.