Motley Fool analysts recommend the State Street SPDR Portfolio Developed World ex-US ETF (SPDW) after comparing it with the iShares Core MSCI EAFE ETF (IEFA). SPDW's expense ratio is 0.03%, lower than IEFA's 0.07%. Its portfolio includes South Korean companies such as Samsung and SK Hynix, which have shown strong growth due to the AI boom, driving SPDW to outperform IEFA in the year ending August 27. Although IEFA has a larger asset under management and higher liquidity, SPDW's cost advantage and exposure to the South Korean market are its main attractions.