World ex-US funds focus on developed foreign markets outside of the United States such as Europe, Asia, and Australia. They are good for investors who prefer investing in stable, well-established countries rather than riskier emerging markets.
The data on this site is a little different than a typical EAFE fund in that it also includes Canada. But the results should be extremely similar to a pure EAFE fund.
World exUS funds have a natural heavy overlap with Europe funds, so investors seeking this type of asset might be best suited selecting one or the other, but not necessarily both.