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.

Execution · Competitive PvP
The fourth Soulcalibur adds armor-breaking Soul Gauge pressure and Critical Finishes to its weapon dueling.

Execution · Competitive PvP
The 3D fighting series opener where execution and human mind-games decide every round.
Soulcalibur IV leans Execution (Competitive PvP); Tekken leans Execution (Competitive PvP).
Tekken leans a little harder on execution, though the gap is small.
Soulcalibur IV
Step-guard and just-guard timing keep a real physical ceiling.
Tekken
Frame-tight inputs, juggle combos, movement demand trained hands
Tekken leans a little harder on reads, though the gap is small.
Soulcalibur IV
Critical Finish threats add layers to adaptive mixup guessing.
Tekken
Human opponent adapts; throws, lows, sidesteps form mixup mind-games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Soulcalibur IV
Soul Gauge is visible; no hidden info.
Tekken
No hidden info; only matchup unfamiliarity early on
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Soulcalibur IV
Guard-crush pressure routes and frame data are studyable.
Tekken
Frame data, punishes, and combo routing are studyable systems
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.