All look the same to me. Cream/white/magnolia. Landlord colours.
Must be something wrong with your eyesight then. If you are a man I wonder if you are colourblind? It does seem that men in general don't see subtleties in colour variations that women do, and would struggle to idenfity for example whether a green was leaning a touch towards yellow, blue or brown while still being a definite green.
To me this doesn't look anything like most paint manufacturers' whites off whites ranges.
www.crownpaints.co.uk/products/standard-emulsion/matt/magnolia/173
People sneeringly use 'Magnolia' as a catch-all term for any pale, vaguely creamy or beigey neutral that isn't an obvious grey, to describe (as you have done) developer/landlord colours.
In my experience developers and landlords stick with pale and fairly neutral for good reason, but go with whatever is the most popular version of that at the time. It might be a very light grey, or griege for example and I think that Dulux Egyptian linen and colours like it have replaced actual Magnolia as the ubiquitous neutral for quite some time now.
Deeper colours are more expensive to produce, they go in and out of fashion too quickly and are harder to paint over later. And people can be repelled by them as much as they can love them, whereas you may not love a pale neutral but you are unlikely to have a strong visceral reaction against it.
Despite the fact that the pale grey trend is already over, I've seen loads of brand new houses by small developers doing the 'entire house in palest grey' thing recently, because it's light and versatile and it's what they think people still want at the moment. So in that respect pale grey is the new magnolia.
It doesn't mean it is magnolia though, in the same way that any of the Farrow and Ball 'whites' are not magnolia either. Some of them have a very subtle, barely discernable green base, or blue, or grey or pink or yellow but you can't necessarily see what, because the profiles are very, vry complex while looking like some version of a period 'white' or 'cream'. Magnolia has lots of yellow and red in it with a bit of black and you know that straight away from looking at it, in the same way you know from looking at even a very pale grey, that it's still grey and not white.
I think maybe when the post war housing boom started in earnest in the 50s and 60s magnolia was the popular colour of the time, much like the decade of pale grey we've just seen, so that's what builders chose.
Even though the various incarnations of 'magnolia' have changed since then depending on interior fashions at the time, people still seem to think that magnolia is a not a shade in its own right, but a term that covers an entire genre of paints - ie light neutrals that aren't obviously grey!
Someone upthread said the Nan described Dulux Egyptian cotton as 'posh magnolia.' If you put the two side by side you'd see they are very different indeed. There is no noticable pink/peach in Egyptian cotton.