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

Execution · Pure Mechanics
Tests twitchy miniature car control and track memory amid party-weapon chaos.

Execution · Pure Mechanics
Demolition derby racer with destructible PvP chaos.
Micro Machines V3 leans Execution (Pure Mechanics); Wreckfest leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Micro Machines V3
Tiny cars on twisty tabletops punish every slip
Wreckfest
Demolition driving, ramming angles
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Micro Machines V3
Couch rivals can be baited with weapons and nudges
Wreckfest
Online derby PvP rewards ramming reads
Wreckfest leans a little harder on variance, though the gap is small.
Micro Machines V3
Pickup spawns and chaos shuffle close races
Wreckfest
Crash physics chaos
Wreckfest leans a little harder on optimization, though the gap is small.
Micro Machines V3
Track memorisation and shortcut lines pay off
Wreckfest
Car upgrades and durability tuning
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.