Interesting!
That particular chair I had was the same everywhere. I moved mine from Australia to the UK and got the new wheel there. Pretty sure it’s the same globally as I went to Shenzhen to visit a supplier a few years later and noticed the boardroom had very familiar seating!
(It was a ‘Markus’)
When the movers came with our container, I checked the dimensions on the actual IKEA bed we had bought in Singapore: It was smaller than the European version, and fit perfectly into the bedroom.