You can identify all efficient drivers that, unlike Koopa, are never dominated on both speed and acceleration. Together, they form what is called the Pareto front (or frontier).
The Pareto efficiency is an objective criteria to filter out suboptimal choices, but you still need to make up your final decision.
Given your play style and skills, you may put more weight on one statistic over the other. Those preferences will reveal the component on the frontier that suits you the best.
Collection
[
|
...
]