head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
Plannable stealth routing punctuated by precise ballistic marksmanship.

Execution · Practiced Mastery
An action-leaning stealth entry where aggressive optimal clears replace pure ghosting.
Sniper Elite III leans Execution (Practiced Mastery); Tom Clancy's Splinter Cell: Conviction 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 III
Ballistic long shots demand steady, compensated aim
Tom Clancy's Splinter Cell: Conviction
Mark-and-execute flow rewards quick, accurate play
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Sniper Elite III
Enemy AI follows mappable alert and search routines
Tom Clancy's Splinter Cell: Conviction
Enemies search via scripted last-known-position logic
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Sniper Elite III
Patrol details and wind vary slightly per attempt
Tom Clancy's Splinter Cell: Conviction
Mild uncertainty in enemy search behavior
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Sniper Elite III
Open maps reward planned routes, sound masking and relocation
Tom Clancy's Splinter Cell: Conviction
Encounter rooms have clear optimal clear orders
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.