On the surface, the courses are quite similar. But there are differences.
Some courses are heavily assessed through coursework whereas others are near exclusively assessed by examination. Check unistats/WhichUni.
Some courses have "law firms" in place of seminars, which present issues as practitioner problems and the group participants are made to pretend they're lawyers who have been tasked to deal with it. This can be useful to develop organisational skills and teamworking ability. York etc do this.
Pretty much all courses have faculty who favour a particular research topic. This is because a lot of the postdocs and lecturers will undertake their research alongside a noted specialist professor/assoc professor. So one type of specialists tend to group up at a particular uni. Southampton, for example, has expertise in shipping. Liverpool has expertise in specific areas of EU law. On the other hand, some courses will be taught by near exclusively practitioners and teach in a very practical way.