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In the UK, Masters level courses in arts subjects -tend- to focus more on theory/concept than the technical aspects; its generally expected that you know those already, and that what you're doing is of a personal research nature. I know that Edinburgh's course is fairly 'conceptually' focussed, for example.
The balance of that may vary among these courses, ...
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Interesting question. I can understand your difficulty in making a decision.
However I feel that you are overlooking the fact that you probably won't learn a whole lot, simply because you already have learned in practice.
Most University courses I know focus a lot on technical aspects, that's not exactly what you need. (That is an impressive list of skills, ...
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