Depends on your use case. Hex's have a lot of advantages when you are a transportation oriented company. All hexes are the same size and the distance between the center of any two adjacent hexes is always the same distance. https://h3geo.org/docs/highlights/aggregation

As an example of where this is useful, it makes it very easy to get a list of all hexes with distance less than X from a current location.

Here's a comparison they give to some of the other common geographical partitions https://h3geo.org/docs/comparisons/s2