Well, I'd say my standard of living is higher in the UK - but not really financially or materially. I mean, I moved from Dallas, Texas, to a lovely small seaside village in the English countryside. I get lots of fresh air, there are castles and gorgeous beaches everywhere, it's never too hot, there's lots of nice places to take walks, and I am eating a lot of fresh food and cooking most everything at home since there aren't really any fast food places around here. I'm getting better health care here than in the US, for the most part, since I didn't have insurance some of the time, and the insurances I had at various points didn't cover my skin medications for psoriasis. I'm happier - I have a happy family and love in my life and usually I don't have nearly as much stress as I had in the US (though recently I have certainly taken some hits). Not sitting in traffic all day does wonders for my sense of contentment!
But, in Dallas, Texas, I found it easier to find jobs and I was able to make more money and easily support myself, while living in a nice neighbourhood and being able to shop and go out to eat and to the movies and museums and other stuff much more often than I do here. I find it's a bit harder to get into that kind of financial position here in the UK, even with a spouse. But, money isn't everything, and some people come by it more easily than others no matter where they are.
So, yes, it depends on what you are looking for.