I’m not sure if upgrade is the right word. DBFZ is a tag team 2D fighter (think MvC2). I absolutely loved that game and got me more interested in fighting games (even though I’m trash at them)

From what I can tell, Sparking Zero! is an arena fighter that’s common for anime adaptation games (think Naruto: Ninja Storm) but is mostly known by it’s spiritual predecessors the DBZ: Budokai Tenkaichi series. Not a big fan of the arena fighters since they’re mostly yearly cash grabs with rarely any depth but to each their own.

Essentially it’s a bit unfair to compare because they’re aimed at slightly different audiences. OG DBZ fans have been waiting for a Budokai Tenkaichi “4” and this is it.