The GlobCover Land Cover product is the highest resolution (300 meters) Global Land Cover product ever produced. The GlobCover Land Cover product is based on ENVISAT MERIS data at full resolution from January 2005 to June 2006. The GlobCover Land Cover product has been developed in partnership with EEA, FAO, GOFC-GOLD, IGBP, JRC and UNEP. The GlobCover Land Cover product is labelled according to the UN Land Cover Classification System.
The first statement seems incorrect, since True Marble was released earlier this year. I would imagine that the quality of the ESA product is higher though.
I assume that the product is available for download through http://ionia1.esrin.esa.int/