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Best Unis in Scotland for Economics

Hello, I am interested in studying economics in Scotland. I'm german/english and doing the IB. My predicted grade is 39 points.
Currenty I am applying to Cambridge, Glasgow, Edinburgh and St Andrews.

For the 5th uni I'm not sure whether to pick Strathclyde, Stirling or Heriot Watt.
All three of them have rather low IB requirements and I was wondering if one of these is significantly better in terms of academics. On the rankings they seem to be quite similar.
If this is truly the case I would just make my decsion based on other factors such as location and atmosphere etc. As I live in germany I haven't gone to see any of them yet but hope to do so this year.

Do any of you go to these unis or have visited? I would appreciate some feedback.