head to head
Neither is simply harder - they are hard in different places. Donkey Kong Country 3: Dixie Kong's Double Trouble! demands more execution; Grand Theft Auto V demands more reads.

Execution · Practiced Mastery
The third SNES Country game sends Dixie and Kiddy across a gadget-filled northern wilderness.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Donkey Kong Country 3: Dixie Kong's Double Trouble! leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Donkey Kong Country 3: Dixie Kong's Double Trouble! leans clearly harder on execution.
Donkey Kong Country 3: Dixie Kong's Double Trouble!
Tight gimmick stages and barrel timing punish sloppiness
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Donkey Kong Country 3: Dixie Kong's Double Trouble!
Everything follows fixed patterns
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Donkey Kong Country 3: Dixie Kong's Double Trouble!
Bonus barrels hidden but static
Grand Theft Auto V
Some mission and lobby randomness.
Donkey Kong Country 3: Dixie Kong's Double Trouble! leans a little harder on optimization, though the gap is small.
Donkey Kong Country 3: Dixie Kong's Double Trouble!
DK coins, banana birds, and 103% routing
Grand Theft Auto V
Heists, money loops, builds learnable.
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
Donkey Kong Country 3: Dixie Kong's Double Trouble! →
full breakdown
Grand Theft Auto V →