head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Practiced Mastery
A free-to-play shooter where you build custom fighting vehicles from blocks and battle other players' creations.

Optimization · Pure Optimization
Large-scale RTS famous for strategic zoom, thousand-unit armies, and a streaming mass-energy economy.
Robocraft leans Optimization (Practiced Mastery); Supreme Commander leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Robocraft
Aiming and piloting matter but vehicles are sluggish
Supreme Commander
Massive APM demands across strategic-zoom battlefields
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Robocraft
Human PvP battles reward outflanking live opponents
Supreme Commander
PvP hinges on scouting and countering opponent commitments
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Robocraft
Matchmaking and map spawns add mild noise
Supreme Commander
Deterministic engine; only unscouted intel
Supreme Commander leans a little harder on optimization, though the gap is small.
Robocraft
Block-by-block build crafting and meta loadouts dominate outcomes
Supreme Commander
Streaming economy and build-order efficiency are the backbone
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.