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

Execution · Practiced Mastery
Aim and spawn memorisation through a fully scripted cinematic campaign.

Execution · Pure Mechanics
An on-rails aim-and-memorise test through fixed FMV sequences.
Call of Duty: Modern Warfare 2 Campaign Remastered leans Execution (Practiced Mastery); Star Wars: Rebel Assault leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare 2 Campaign Remastered
Aim and reaction carry every scripted firefight
Star Wars: Rebel Assault
On-rails aiming and dodge timing is the entire challenge
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare 2 Campaign Remastered
Enemies spawn and behave on fixed scripts
Star Wars: Rebel Assault
Every sequence is pre-rendered and fixed
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare 2 Campaign Remastered
Set-piece campaign with almost nothing random
Star Wars: Rebel Assault
Nothing varies between attempts
Call of Duty: Modern Warfare 2 Campaign Remastered leans a little harder on optimization, though the gap is small.
Call of Duty: Modern Warfare 2 Campaign Remastered
Learning spawns and cover lines trivialises veteran difficulty
Star Wars: Rebel Assault
Memorising each rail sequence's threats carries completion
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
Call of Duty: Modern Warfare 2 Campaign Remastered →
full breakdown
Star Wars: Rebel Assault →