American University vs Trinity College Dublin

[Bruhidk]

Hello I am having a very hard time choosing between two different masters programs. The programs are: 

A 1 year MSc in Development Practice at Trinity College Dublin. 

(The summer would be spent doing a research placement abroad which a thesis would be based off of) 

Or a 2 year dual degree program between American University in DC and University for Peace in Costa Rica resulting in an MA in International Affairs from AU and an MA in Natural Resources and Sustainable Development from UPeace (one semester at AU followed by two semester at UPeace followed by another semester at AU) (Summer would be spent doing research placement abroad that results in a final group capstone project)

Career wise I want to work abroad (probably with A US based agency or NGO) or at least travel abroad frequently with my job. I am interested in both international development as well as environmental sustainability. The program at trinity does encompass a large amount of sustainability courses but American much more so. 

In the event that I do not receive any further funding, trinity would be half the price of AU/UPeace. Would the extra debt be worth it for the extra degree? Would a degree from a US school be viewed more favorably by US employers? Or vice versa due to trinity being ranked much higher than American (although it's my impression trinity is not well known in the US)?