head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
Methodical infiltration planning paid off by one well-compensated rifle shot.

Execution · Practiced Mastery
Ballistic compensation and patrol memorisation along heavily scripted stealth corridors.
Sniper Elite: Resistance leans Execution (Practiced Mastery); Sniper: Ghost Warrior leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Sniper Elite: Resistance
Ballistics-compensated shots and stealth timing need steady hands
Sniper: Ghost Warrior
Accounting for wind and drop on long shots demands steady aim
Sniper Elite: Resistance leans a little harder on reads, though the gap is small.
Sniper Elite: Resistance
Invasion mode adds occasional human cat-and-mouse
Sniper: Ghost Warrior
Enemy AI runs scripted patrols, not adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Sniper Elite: Resistance
Patrol details are scripted-but-unknown on first infiltration
Sniper: Ghost Warrior
Wind values add per-shot noise to compensate for
Sniper Elite: Resistance leans a little harder on optimization, though the gap is small.
Sniper Elite: Resistance
Route planning, sound masking and shot setups reward study
Sniper: Ghost Warrior
Learning patrol routes and stealth paths solves each level
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.