The trouble is that trying to answer the "which car is best" question is impossible at any time because one person's wants or needs - and even they're often different - won't be at all the same as someone else's. Taking the aforementioned Skoda Superb as an example: it's probably the best car in the world if you are a minicab driver, but might just be the worst car in the world if you are a professional footballer.
I feel a bit sorry for Motty really, because he's trying to judge a car based primarily on its towing ability and that's even harder. Because that's not going to be anywhere near the top of many tower's list of priorities. In this instance I'll use myself as an example. My car covered roughly 3000 miles towing last year and 25k miles not towing. Of the non-towing miles, many were spent on the UK's motorway and A road network, carrying work tools and samples during the week and scuba diving equipment at weekends. So before I even think about towing capability - and much as I might like a 2-seater sports car - I need to make sure it offers load capacity, comfort, economy and safety. However, I rarely if ever go off road - except for grass-covered caravan sites, obviously - or carry more than one passenger, so I don't need an MPV or SUV. This narrowed it down to a diesel estate. I'm aware that I could tow a bigger caravan if I had a 4x4, but this just wouldn't be worth the compromises I'd have to make everywhere else.
However, if I'm ever able to retire with my body and brain still working, I'd like to be able to buy something big and luxurious and tour around as much of Europe as I can. In which case I won't be even remotely interested in the towing ability of estate cars because whatever they are, they won't be enough. But that's in the future. This is now, and I'm someone to whom a Skoda Superb should be ideally suited. So why - despite the c.£1k price difference as Motty correctly identifies - am I on my third Passat estate instead?
Well it's simple really. I know that both cars are mechanically identical and indeed most of the parts you can't see are the same. The problem is that most of the parts you can see in the Skoda simply aren't as nice as those in the VW. The interior plastics are that bit cheaper and nastier, the seats aren't quite as comfortable and it's not as well soundproofed. I realise that none of these things affect the car's towing ability. But when you practically live in it whilst on motorways some days, they matter.
I've argued the point before using the bread analogy. The cheapest sliced loaf you can buy in the supermarket is made using exactly the same ingredients and probably offers the same nutritional value as the warm crusty loaf you can buy in the nearest bakery. But given the choice of what to have for breakfast, which would you go for?