The A330neo series is a brand new aircraft line from Airbus and is an update to their successful A330 line. Much like the A320 upgrade to the A320neo, the A330neo brings a whole heap of new features that airlines and passengers will love.
Some of these features include quieter engines (very powerful Rolls Royce Trent 7000 engines), a brand new wing (reducing fuel burn by 14%), a bigger range of +400 nautical miles, reduced greenhouse gas emissions, more seats onboard without reducing passenger comfort and better pressurization. Plus, passengers can enjoy bigger overhead bins, bigger windows, mood lighting, quieter inflight noise and a new entertainment system (one that saves 400kg of weight!).
Collected and summarized from the source below by Quynh Hoa https://simpleflying.com/a330neo-changing-aviation/