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
Corridor shooting plus picking the right squad ability for each scripted encounter.

Execution · Practiced Mastery
Shooting patterned alien swarms with creative destruction tools down linear tunnels.
Clive Barker's Jericho leans Execution (Practiced Mastery); Red Faction: Armageddon 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.
Clive Barker's Jericho
Aim and squad-ability timing through corridor firefights
Red Faction: Armageddon
Standard third-person aiming with magnet-gun flair
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Clive Barker's Jericho
Horrors attack on fixed scripts, nothing adapts
Red Faction: Armageddon
Alien swarms attack on spawn scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Clive Barker's Jericho
Linear set pieces with minimal randomness
Red Faction: Armageddon
Linear underground campaign, little randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Clive Barker's Jericho
Choosing the right squad member per encounter is the layer
Red Faction: Armageddon
Weapon upgrade picks and destruction tactics reward planning
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.