"I think there’s a bit of an ego trip happening,” Matt Lanter, Anakin’s vocal performer, tells EW. “Anakin and Tarkin are testing each other out a little bit. On a bigger scale, though, we keep giving fans more tie-ins on the Clone Wars to the original trilogy."
We have also learned that Tarkin's voice will be provided by Stephen Stanton.
Check out the new Tarkin clip and more information from Dave Filoni here on EW's Inside TV blog.