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

Execution · Practiced Mastery
A college football simulation game with arcade-style gameplay.

Execution · Practiced Mastery
A cover-shooter Rainbow Six blending tactical room-clearing with solid gunplay.
NCAA Gamebreaker leans Execution (Practiced Mastery); Tom Clancy's Rainbow Six: Vegas 2 leans Execution (Practiced Mastery).
Tom Clancy's Rainbow Six: Vegas 2 leans a little harder on execution, though the gap is small.
NCAA Gamebreaker
play execution and timing on the field matters
Tom Clancy's Rainbow Six: Vegas 2
Cover-based gunfights still punish poor aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
NCAA Gamebreaker
opposing plays can be partially predicted/countered
Tom Clancy's Rainbow Six: Vegas 2
Multiplayer brings some human adaptation; AI is scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
NCAA Gamebreaker
play calls and randomized outcomes affect plays
Tom Clancy's Rainbow Six: Vegas 2
Enemy placements partially unknown per encounter
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
NCAA Gamebreaker
playbook knowledge and roster management are solvable
Tom Clancy's Rainbow Six: Vegas 2
Room-clearing order and squad commands are solvable tactics
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.