Flight Time – New Mavic Air 2 flight time is now 34 minutes, compared to 21 minutes on the Mavic Air.
Stronger Stabilization – Mavic Air 2 can also fly in higher winds than the original Mavic Air.
Video Transmission – The Mavic Air 2 has OcuSysnc 2.0 with a HDR video transmission of 6.2 miles (10 km), compared to 2.5 miles (4 km) on the original Mavic Air.
Improved Camera – Mavic Air 2 has a 48 megapixel camera, allowing you to shoot photos up to 8k.
New Camera Features – The Mavic Air 2 uses High Dynamic Range, color optimization and a new SmartPhoto intelligent mode allowing you to capture stunning professional photos.  It can also shoot 4k video at 60p and slow motion video at 240 fps, all in HDR.
Improved Intelligent Flight Modes –  Mavic Air 2 now has ActiveTrack 3.0, Spotlight 2.0,  Points Of Interest 3.0 and 6 QuickShots.
Improved Obstacle Avoidance – The Mavic Air 2 uses Vision Sensors and ToF Sensors, along with APAS 3.0 for vastly improved obstacle avoidance technology.
Remote Controller – Totally new Remote Controller.
New App – Mavic Air 2 uses the DJI Fly app.