People saying ‘York because it is a Russel Group’ is some of the worst reasoning I have heard.
Russell groups are unis that generally have very good research facilities, which is more important when you do a post grad research masters or PhD - not an under grad law degree....
I don’t personally know which one is better as I’ve never looked at either uni (I live up north and can say York is a beautiful city but never been to Leicester so can’t really compare it), but saying ‘York because the is a RG’ is not a valid reason in my opinion. Lancaster, for example, is highly rated in many subjects but is not a RG.