The main difference with the US vaccine list seems to be that they're only doing the over 65s, before moving on to keyworker groups. You'd expect that approach to be better at getting infection rates down (as the keyworkers are more likely to catch and spread it) but take longer to bring down hospitalisations - a lot of which are in the 50-65 age group. And also, it's less prescriptive than ours - so no effort to prioritise the very vulnerable from within their group 1A.
We've also not decided what to do for the under 50s. Ie whether to do some age based approach and/or occupation based