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 · Competitive PvP
Fast aim duels plus predicting human movement on memorised maps.

Execution · Competitive PvP
Couch-competitive archery brawler decided by twitch arrows and reading your friends.
Call of Duty: Modern Warfare Remastered leans Execution (Competitive PvP); TowerFall Ascension leans Execution (Competitive PvP).
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 Remastered
Snap aim and reaction time dominate every gunfight
TowerFall Ascension
Arrow aim, dodges, and arrow catches are razor-tight
TowerFall Ascension leans a little harder on reads, though the gap is small.
Call of Duty: Modern Warfare Remastered
Online opponents rotate and adapt; pre-aiming them is prediction
TowerFall Ascension
Couch PvP is constant mutual prediction and baiting
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 Remastered
Spawns and random lobbies inject per-match noise
TowerFall Ascension
Random powerup chests and variants spice rounds
Call of Duty: Modern Warfare Remastered leans a little harder on optimization, though the gap is small.
Call of Duty: Modern Warfare Remastered
Map control, loadouts and timing form a learnable meta
TowerFall Ascension
Small fixed arenas leave little system to solve
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.