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
Arcade car control across loose surfaces, weather and door-to-door packs.

Execution · Pure Mechanics
A snowboarding sim testing precise trick execution and line memorization.
Dirt 5 leans Execution (Pure Mechanics); Shredders leans Execution (Pure Mechanics).
Shredders leans a little harder on execution, though the gap is small.
Dirt 5
Sliding off-road cars on mixed surfaces is the whole test
Shredders
Precise trick timing, balance and landing control dominate
Dirt 5 leans a little harder on reads, though the gap is small.
Dirt 5
Pack racing adds light wheel-to-wheel jockeying
Shredders
Mostly solo/coop, no adaptive opponent to predict
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt 5
Dynamic weather shifts grip unpredictably
Shredders
Slope conditions fixed, little randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt 5
Car class knowledge and line choice reward study
Shredders
Learning lines and trick combos for score routes
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.