I'm not that surprised, the pound is still fairly weak compared to historical averages which is likely to have knocked it down international rankings like this.

The only one of these on the list I have any experience with though is Paris, the main thing I remember is that eating out there seemed to be a lot more expensive than London for the rough equivalent and an amount that would get you an ok place to stay in London got me absolute garbage in Paris. But this is all vague personal experience anecdotes.

Meanwhile I'm not surprised to see two Swiss cities in the list. I live in London, my brothers live in Switzerland in a city 1/80th the population, and I feel I can live like a king compared to the prices over there. And everything's privatised, so you have to pay even more than normal European standards.