There are several 'rankings' of medical schools in the UK - Glasgow often beats Edinburgh, and Edinburgh often beats Glasgow. They're both right up there anyway. It all depends which factors are being measured; the four main sources of rankings are quoted here:https://themsag.com/blogs/get-into-medic...ool-rankings-uk
The key factor though is the quality of the medical training; that will be the same in all med schools as it's monitored by the GMC and not just the individual universities. They all have to cover the same subjects and they have to have the same standards of assessment - and that's true across the UK so despite differences between NHS England and NHS Scotland, the medical training is the same and the rankings don't mean much.
What Felix needs to look at is how he will be taught, not what. Some people learn better in a structured lecture environment, some do better in a tutorial/seminar system. Although in general Asian students are more used to the lectures method, if Felix has a liking for Philosophy he might prefer a method involving more active discussions.