Windows 98 Second Edition, build number 4.10.2222, has some features not seen in the original Windows 98 like Internet Connection Sharing and probably upgraded DirectX and other system libraries.

The difference between the original Windows 95 and its later OSR updates is much bigger. Windows 95 OSR2 (and later OSR2.1 and 2.5) actually is a bigger step up than the difference between 95 and 98.