Hi,
I am currently studying my MSc Global Health at the University of Southampton.
I think the answer to which course you do really depends what route you want to go down.
I share a few modules with the MSc Public Health students, but the rest of their course tends to lean more into learning about how to produce and measure policies, such as in the UK, whereas my course focuses more on the measurement of global health trends, from (as you said) a multidisciplinary approach. I have found that the people on my course are from a variety of backgrounds: sociology, environmental science, nursing, medicine, while the public health students are often doing the masters as part of their job or to get into the field of public health specifically.
I think the MSc in Global Health leads to many opportunities, such as working for NGO's, charities, in healthcare, in statistical/research roles, but is perhaps not as specialist as the MSc in Public Health, which is what will be required if you want to enter that specific area.
I am loving my degree so far and have gotten the opportunity to reach out into areas I previously hadn't, it is so broad-ranging. I have done epidemiology, research methods including quant, qual and mixed, reproductive health, ageing, and measuring trends, as some examples.
I am not sure how the UCL course compares to this but I imagine it is somewhat similar, so if you are looking for something a bit different but interesting and allowing you to focus on lots of different areas I would thoroughly recommend it!
Hope this helps,
Abbie
University of Southampton, Postgraduate Ambassador