Global has very little in the way of contract law and replaces that with a lot of International (Global?) law such as sale of goods and arbitration
English law has a lot more contract law in the syllabus. There is a full suite of English law lectures on the site but only coverage of around 50% – 60% Global law is covered by those lectures
If you have ambitions to practice as an auditor / accountant in the UK in the future, the sensible thing would be to enter for English variant