Which is better the Halo Editing Kit or the Halo Map Tools

For Halo CE, HEK is better because that was what it was designed for. It does not work with Halo Full or Trial/Demo. All of hte HMT plugins are in Esachon, along with a bunch of other plugins, Eschaton can even open CE maps. Use Escahon, it is PC an map. if you want my opinion though, HMT is better than HEK because it is used more often.