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

Variance · Grand Arena
Turn-based fantasy football where orcs, elves, and dice decide the league.

Optimization · Grand Arena
A deep card game blending opponent reads, draw variance, and sequencing.
Blood Bowl 2 leans Variance (Grand Arena); Magic: The Gathering Arena leans Optimization (Grand Arena).
Magic: The Gathering Arena leans a little harder on execution, though the gap is small.
Blood Bowl 2
Turn-based tactics; no reflex demand
Magic: The Gathering Arena
Pure clicks, no mechanical skill
Magic: The Gathering Arena leans a little harder on reads, though the gap is small.
Blood Bowl 2
PvP positioning baits opponents into bad dice commitments
Magic: The Gathering Arena
Bluffing instants and combat tricks against humans
Blood Bowl 2 leans a little harder on variance, though the gap is small.
Blood Bowl 2
Block dice and failed pickups decide entire matches
Magic: The Gathering Arena
Mana screw and topdecks remain decisive
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Blood Bowl 2
Risk-ordering actions and team development are deep solvable craft
Magic: The Gathering Arena
Deepest sequencing, deckbuilding, and stack puzzles
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.