The Windows Experience Index has changed from Windows 7 Beta on the same netbook. Only the subscore for memory has increased from 4.4 to 4.5 whereas the subscores for graphics and gaming graphics have decreased. However, subscores for processor and primary hard disk remain unchanged.
In fact, the memory subscore for Lenovo IdeaPad S10 with 1GB of memory is similar to MSI Wind with 2GB of memory. For primary hard disk, S10 outperformed Wind. Gaming graphics subscore is not important as netbook is not built for games.