head to head
Mario Kart 8 asks more than Hong Kong 97, and the gap is variance.

Execution · Twitch Chaos
A notoriously broken shooter testing nothing but tolerance and basic bullet dodging.

Execution · Twitch Chaos
A kart racer where controlled chaos from random items tempers otherwise precise driving skill.
Hong Kong 97 leans Execution (Twitch Chaos); Mario Kart 8 leans Execution (Twitch Chaos).
Mario Kart 8 leans clearly harder on execution.
Hong Kong 97
Dodging bullet spam with one-hit deaths is the only skill present
Mario Kart 8
precise drifting and item timing matter
Mario Kart 8 leans a little harder on reads, though the gap is small.
Hong Kong 97
Enemies spawn in mindless waves
Mario Kart 8
minimal, mostly reacting not predicting
Mario Kart 8 leans clearly harder on variance.
Hong Kong 97
Spawn patterns have slight randomness
Mario Kart 8
item boxes are heavily randomized
Mario Kart 8 leans clearly harder on optimization.
Hong Kong 97
There is almost no system to optimise
Mario Kart 8
track lines and item strategy solvable
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.