University of Maastricht or University of Groningen

Hi guys,

I've been accepted at both University of Maastricht and University of Groningen but I have no idea which one to choose.The Master's programme in Maastricht is European Studies and the one in Groningen is called International Security. I have obtained a bachelor degree in International Relations in my home country but I want to further develop as a specialist in the field, this is why I chose to apply for the above-mentioned programmes.I am trying to do a research, so I can choose the best suited university for me, but I am struggling.
First of all, I am not really sure if I should pay attention to the international rankings of the universities. Groningen is doing much better in terms of rankings (being in top 100 in the world), which is quite impressive. On the other hand, Maastricht is comparatively new university in top 150-200 worldwide.
Second of all, I am hesitating which programme will give me more opportunities for future career development.
Additionally, I am not Dutch, therefore, I want to be prepared for the cost of living in the Netherlands, and more specifically, in Groningen and Maastricht. I have read online that in Maastricht it was much easier to find a room (and some opinions that it was slightly cheaper than Groningen). Is August early enough to start looking for a room, especially from distance, since I can go to the NL as early as 25-30 August. If you can recommend an agency or anything that will ease me in finding a room as soon as possible, I'd be really grateful.
Last but not least, is the teaching approach in both universities problem-based learning? I am sure that in Maastricht this is the case, but i don't know about Groningen. I am also curious to know if these two programmes include too much theory and no practice.
I would appreciate any opinion on these two universities/programmes. Many thanks in advance!