head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Pure Mechanics
Floaty one-button momentum control in arcade altitude duels.

Execution · Pure Mechanics
A pure lane-timing reflex test against head-on collision cars.
Balloon Fight leans Execution (Pure Mechanics); Dodge 'Em leans Execution (Pure Mechanics).
Balloon Fight leans a little harder on execution, though the gap is small.
Balloon Fight
Flap-physics altitude duels demand precise momentum control
Dodge 'Em
Lane-switch timing against closing cars is the whole game
Balloon Fight leans a little harder on reads, though the gap is small.
Balloon Fight
A couch rival adds light prediction; birds don't adapt
Dodge 'Em
Computer cars chase head-on by simple fixed logic
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Balloon Fight
Enemy drift and lightning add arcade randomness
Dodge 'Em
Opposing car spawns vary slightly per loop
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Balloon Fight
Spawn patterns and safe positions are quickly mapped
Dodge 'Em
Optimal lane patterns are quickly learnable
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.