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 · Practiced Mastery
Aggressive circuit racing testing car control over memorisable tracks and braking points.

Execution · Practiced Mastery
An open-world racing MMO about collecting cars and cruising Ibiza and Hawaii.
Race Driver: Grid leans Execution (Practiced Mastery); Test Drive Unlimited 2 leans Execution (Practiced Mastery).
Race Driver: Grid leans a little harder on execution, though the gap is small.
Race Driver: Grid
Aggressive wheel-to-wheel car control is the core demand
Test Drive Unlimited 2
Open-road car control decides races
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Race Driver: Grid
Online racing adds light opponent positioning awareness
Test Drive Unlimited 2
Online rivals add mild jockeying
Test Drive Unlimited 2 leans a little harder on variance, though the gap is small.
Race Driver: Grid
Damage outcomes add slight unpredictability to contact
Test Drive Unlimited 2
Traffic and weather add small noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Race Driver: Grid
Braking points, lines and flashback management are learnable
Test Drive Unlimited 2
Car choice, upgrades, and route knowledge compound
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.