Yes, as long it is a single target RG Wizz will come out on top. Also, during the rift the DH will probably help more than the Wizz regarding potential grouping of mobs. Bare in mind they showed just the RG kills in the video, not the entire rifts. And for that purpose the video is fine.
However, for extreme pushing, in the ideal rift, Wizz probably will be the go to "solution".