For Metro 2033 Redux, Metro 2033 has been rebuilt using the newest version of the powerful 4A Engine(画面升级,用了新引擎), last seen in action in Metro: Last Light. That means advanced lighting, dynamic weather, higher detail for characters with improved animation, more dynamic destruction, and improved smoke, fire, and particle effect.
Metro: Last Light Redux has also received a upgrade, including new melee animations(新的近战特效?) and the fan-requested ‘Check Watch’ and ‘Check Inventory’ features(增加查看手表?和查看背包的功能). All previously released Metro: Last Light DLC will be included in this Redux version.
感觉上没有必要买重制版吧