head to head
Virtua Cop 2 asks more than Half-Life 2, and the gap is execution.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.

Execution · Pure Mechanics
The sequel adds branching routes and quicker targets to the arcade light-gun formula.
Half-Life 2 leans Execution (Pure Mechanics); Virtua Cop 2 leans Execution (Pure Mechanics).
Virtua Cop 2 leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Virtua Cop 2
Faster targets and hostage shots sharpen the aim test
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Virtua Cop 2
Rail sequences are fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Almost no randomness.
Virtua Cop 2
Branch choices aside, runs are identical
Virtua Cop 2 leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Virtua Cop 2
Route branches and spawn memorization drive scores
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.