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
A rally racer where mastering precise car control against tricky terrain is everything.

Execution · Pure Mechanics
A twin-stick arcade shooter framed as a lethal game show of swarming arenas and prizes.
Colin McRae: Dirt 2 leans Execution (Pure Mechanics); Smash TV leans Execution (Pure Mechanics).
Smash TV leans a little harder on execution, though the gap is small.
Colin McRae: Dirt 2
precise rally driving and braking required
Smash TV
Twin-stick aim and dodging through swarming arenas is everything.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Colin McRae: Dirt 2
no adaptive opponents, mostly time trials
Smash TV
Mobs rush mindlessly on scripts.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Colin McRae: Dirt 2
weather and surface conditions vary
Smash TV
Spawn timing and pickups vary modestly.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Colin McRae: Dirt 2
car tuning and racing lines solvable
Smash TV
Room order, powerup priorities, and boss patterns are 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.