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FYI: One of the main reasons we often tout the idea that you should look closely under the hood of any ETF you choose within a segment is because differences in the makeup of a portfolio will lead to differences in total returns. Sometimes, however, those return differences aren’t quite apparent despite sizable portfolio tilts. Regards, Ted http://www.etf.com/sections/features-and-news/eem-vs-vwo-country-tilts-mean-little?nopaging=1