AA , UCL or Sheffield

Hi. I have studied Architecture in Greece and I am interested in taking a post-graduate course in UK. I submitted applications in AA, UCL and Sheffield. Untill now I have been accepted in AA and Sheffield and I am awaiting an answer from UCL. However, there are various factors that make me doubtful about my desicion.

The three courses are listed below:

http://www.aaschool.ac.uk/STUDY/GRADUATE/?name=emtech

http://www.ucl.ac.uk/prospective-students/graduate/taught/degrees/architectural-computation-msc

https://www.sheffield.ac.uk/architecture/postgraduate/masters/digital-design

Can you give me any hints or help from your personal experience or opinion?
Thank you in advance!