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
A football simulation series competing with Madden in the 90s.

Execution · Practiced Mastery
A cover-shooter Rainbow Six blending tactical room-clearing with solid gunplay.
NFL GameDay leans Execution (Practiced Mastery); Tom Clancy's Rainbow Six: Vegas 2 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.
NFL GameDay
player control and timing on plays 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.
NFL GameDay
AI defense has limited adaptive counterplay
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.
NFL GameDay
play outcomes involve randomized elements
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.
NFL GameDay
playbook and roster strategy 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.