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

Execution · Pure Mechanics
Twitch tank duels while protecting a base from scripted enemy waves.

Execution · Pure Mechanics
A Columns-style falling-block test of placement speed under acceleration.
Battle City leans Execution (Pure Mechanics); Magic Jewelry leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Battle City
Tank aim and dodge timing under pressure decides every stage
Magic Jewelry
Fast column placement under accelerating drop speed
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Battle City
Enemy tanks follow simple scripted routines, nothing adaptive
Magic Jewelry
Solo puzzle, nothing to predict
Magic Jewelry leans a little harder on variance, though the gap is small.
Battle City
Spawn order and power-ups add mild randomness per stage
Magic Jewelry
Random jewel columns are bounded and mappable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Battle City
Base-defense positioning and brick management have known best answers
Magic Jewelry
Stacking for chain matches has known patterns
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.