I am used to wild claims by 1st parties releasing a product. I always try to test the product myself, before judging it, if that is possible. If it is not possible, I try to research as much as I can, what I want to know about that product.
There is a possibility, that on their machines in indeed took less RAM, because they had a different version, like for example a development version, that might be slimmer in some way (though, debugging versions of software are usually bigger, not slimmer). Sometimes information on websites that are hosted by a tiny amount of people, who perhaps even only work on the project in their free time, might be very slow to be updated. I’ve seen a lot of websites that were not dead but they were updated so infrequently, it basically had almost always obsolete information on it.
The whole distro comparison discussion situation brought me back to Distrowatch, where I have not been looking for a new distro for a pretty long time, because I did not need to. I found a couple of interesting distributions, one of them being Finnix.
When you browse around that Wiki styled homepage, you eventually come across the Documentation, of which most is apparently already obsolete… This is one example of outdated information on a website, that has a small user base and probably a small team of people responsible for this product.
and colleges too