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 · Competitive PvP
A class-based objective shooter remembered for its parkour movement and rocky launch.

Execution · Competitive PvP
A grapple-timing and guessing game built for couch competition.
Brink leans Execution (Competitive PvP); WWF WrestleMania 2000 leans Execution (Competitive PvP).
Brink leans a little harder on execution, though the gap is small.
Brink
SMART parkour and gunfights demand FPS mechanics
WWF WrestleMania 2000
Grapple timing and reversal windows reward fast hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Brink
Human teams contest objectives and flank routes
WWF WrestleMania 2000
Versus friends, grapple-versus-strike guessing is a real mind game
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Brink
Spawn and objective chaos adds noise
WWF WrestleMania 2000
Momentum swings add some scripted drama
Brink leans a little harder on optimization, though the gap is small.
Brink
Class loadouts and objective timing are learnable
WWF WrestleMania 2000
Move sets and reversal systems are learnable but shallow
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.