New Legend of Heroes Update to Zero Evolution hitting the Vita

Wasn't there another Legend of Heroes game announced the other day? Yes there was, in the form of Trails of Blue. I'm pretty sure this is a different game, another update to an existing title? Certainly, a story has just published on Famitsu with this trailer and lots of Japanese tweets are getting rather excited. Can someone more into their JRPGs tell us the difference please?

It seems to be an update with full voice acting and is due out next year.