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

Optimization · Practiced Mastery
Side-scrolling stealth that rewards memorising patrols and executing clean routes.

Optimization · Practiced Mastery
The PS3 debut of Ratchet & Clank, mixing exotic weapons with an upgrade-driven adventure.
Assassin's Creed Chronicles: China leans Optimization (Practiced Mastery); Ratchet & Clank Future: Tools of Destruction leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Chronicles: China
Stealth timing and climb precision punish sloppiness
Ratchet & Clank Future: Tools of Destruction
Third-person shooting and platforming, moderately demanding
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Chronicles: China
Guard patrols are fixed memorisable loops
Ratchet & Clank Future: Tools of Destruction
Scripted enemy waves
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Chronicles: China
Everything is scripted and visible with study
Ratchet & Clank Future: Tools of Destruction
Deterministic encounters
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Chronicles: China
Routing perfect-stealth paths through guard patterns is the score game
Ratchet & Clank Future: Tools of Destruction
Weapon levelling economy and upgrade pathing
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.
full breakdown
Assassin's Creed Chronicles: China →
full breakdown
Ratchet & Clank Future: Tools of Destruction →