Corporate Edition is a special version for use in a corporate environment. It is similar to the Full version, minus a few items, but alomst just as powerful. It has a strong focus on open-source software.
K-Lite Codec Pack is a collection of VFW/ACM codecs, DirectShow filters and tools. Codecs and DirectShow filters are needed for encoding and decoding (playing) audio and video formats. The K-Lite Codec Pack is designed as a user-friendly solution for playing all your movie files. With the K-Lite Codec Pack you should be able to play all the popular audio and video formats and even several less common formats.
What's new in this version:
Version 6.2 updates ffdshow and VP8 decoder.