The main differences are vastly increased flight time, lighter weight (which helps with the flight time), 3-Axis Gimbal (providing much better image stabilization) and increased video resolution! The video above goes into more detail on the differences of the DJI Spark and DJI Mavic Mini, with comparison of video footage including a review of each drone!
You can read more about the differences in the Specs below:
DJI SPARK FOOTAGE
DJI MAVIC MINI FOOTAGE
is on a decades old journey to experience the world.