I just read the whole review. The writer should have prefaced it with "Full disclosure, I hate BMW and convinced myself that I would also hate the Z4 before I even drove it. All I had to do was write the review to fit my biases."
I seriously wonder if the reviewer has his own Audi tucked up in his garage. Every positive found in the Z4 had to have a negative comment added, e.g. The Z4 has 2 cupholders as opposed to the TT's one (if I read it correctly). However, you can't use the cupholders in the Z4 without having the armrest up. What he didn't mention was that the Z4's armrest is specifically designed so that you can raise part of the armrest to fit the cupholders, but still have part of it down to rest your arm on. I think this is quite a clever design, but the writer didn't want to mention it.
...The other benefit is a bigger cubby beneath the centre armrest than you get in the TT, but there’s a flaw: that’s where the Z4’s cupholders are located, so you have to drive with the cubby’s lid open if you’ve stopped for a takeaway coffee..
And so on, it seems, for every point they cover when comparing the two.