head to head
Neither is simply harder - they are hard in different places. FragPunk demands more execution; Heroes of the Storm demands more optimization.

Execution · Competitive PvP
Aim duels against humans under round rules reshuffled by random cards.

Reads · Mind & Math
Objective-driven MOBA with shared team XP.
FragPunk leans Execution (Competitive PvP); Heroes of the Storm leans Reads (Mind & Math).
FragPunk leans clearly harder on execution.
FragPunk
Hero-shooter gunfights demand high-level aim and movement
Heroes of the Storm
Skillshots and rotations require hands
Heroes of the Storm leans a little harder on reads, though the gap is small.
FragPunk
Predicting enemy pushes and card-driven adaptations is constant
Heroes of the Storm
Team-fight cooldown trading is prediction
FragPunk leans clearly harder on variance.
FragPunk
Shard Card votes reshuffle each round's rules unpredictably
Heroes of the Storm
Map objectives and merc camps vary
Heroes of the Storm leans clearly harder on optimization.
FragPunk
Hero kits and card synergies reward system study
Heroes of the Storm
Talent picks and team comps deep
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.