I have never believed January applications are treated the same as early applications when some candidates are offered places by the end of October
You may believe this, but it doesn't mean it's true. Unless you're an academic with several years' experience? Oh no, you're just talking about 2 individual applications ...
Such opinion stated as fact is really not helpful to all the nervous applicants doing it for the first time, and their parents.
Believe it or not, academics are actually quite experienced, expert, and knowledgeable. We use this experience, expertise and knowledge to help us select/offer to UCAS applicants we think - from the available evidence of UCAS forms and interviews (if we do interviews or other face to face selection procedures) - will be a good fit for our degree programmes.
We do know what we're doing, funnily enough we're quite clever people It's in our interests to offer places to as many good candidates as we can. We have to teach the students for 3-4 years, after all.
And more importantly, we want them to thrive, succeed, be interested and interesting and be enthused about what we are offering them. We want them to learn, and to grow. We want some of them to do so well that they stay on, to develop and extend knowledge by doing PhDs.
We want our graduates to go out & change the world. Seriously -- that's what I want all my students to do. So why would I limit the field I'm looking at?
The October/January impression is often because Oxbridge applications have to be in in October, which is a lot earlier than the UCAS cut off date in January. And Oxbridge applicants will generally have outstanding UCAS forms which will get them offers elsewhere.
And conversely, IME (20 years in the business, plus stints at several universities as Admissions Tutor), the less talented (in relative terms, of course!) tend to apply later. I don't know why. And I can assure anyone reading, that in the departments I've worked in, anyhow, applicants in January are just as likely to be offered a place as those in October, if they match our requirements and seem like a good fit for our programme. And because we actually teach our programme, we are pretty good judges of that fit.