If you want to be in the international security field, I would definitely go with SFS! Columbia's program has more of a broad human rights/refugee focus, which is great, but SFS has entire degree directed towards security studies. If you are more interested in working at the UN, then SIPA would be a better option. But if you are looking for a career at an international agency/security, you definitely want to be in DC. Aside from the UN, NYC does not really compare to IR/security opportunities.
Also, if you are looking for something in development, Georgetown has a concentration for that, and they also provide an option to form your own curriculum as long you take the required economics/stats/general IR/language classes.
Last note: don't obsess over the "Ivy tag" lmaooo. As a Yale graduate myself (went there for undergrad), I have no problem stating that Georgetown SFS is overall better program than Columbia SIPA. Although it was difficult for me to turn down Harvard Kennedy for Georgetown SFS, I'm glad I went to the SFS. Became a foreign service officer and now I work at an investment firm in DC, focusing in the Aerospace & technology industry (no, not just investing in military stuff!). Took the Global Finance track at SFS.
Let me know if you have any questions...feel free to reach out!!!:)