head to head
Neither is simply harder - they are hard in different places. Grand Theft Auto: San Andreas demands more optimization; Sparkle 2 demands more execution.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.

Execution · Practiced Mastery
Zuma-style marble shooting testing aim under pressure against a random color feed.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Sparkle 2 leans Execution (Practiced Mastery).
Sparkle 2 leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Sparkle 2
Accurate orb shots under advancing-chain pressure decide levels
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Sparkle 2
No opponent - the chain just advances
Sparkle 2 leans a little harder on variance, though the gap is small.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Sparkle 2
Orb color feed is random within bounds
Grand Theft Auto: San Andreas leans clearly harder on optimization.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Sparkle 2
Enchantment loadouts and chain-combo planning add a solvable layer
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.