London or Bristol. Where should I go?

I am a Science teacher from Thailand and have applied to do my Master's Degree in the UK. I am accepted at King's College in London (MA in Science Education) and University of Bristol in Bristol (M.Sc in Science and Education). Which degree/university will be beneficial (useful and recognized) to me in teaching science in Thailand? I am generally an outgoing person who likes to party and meet new people. Which city would be better for me? Which one is more culturally diverse? I do not have the time to visit the two places before I decide since the courses are starting pretty soon. Please help me make a decision in terms of the degree and the place!