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
Wrestling-style timing duels with grapple prediction against human opponents.

Execution · Competitive PvP
Cover-based shotgun duels testing movement execution and positional prediction in multiplayer.
Def Jam Vendetta leans Execution (Competitive PvP); Gears of War: Ultimate Edition leans Execution (Competitive PvP).
Gears of War: Ultimate Edition leans a little harder on execution, though the gap is small.
Def Jam Vendetta
Grapple timing and reversal windows demand sharp inputs
Gears of War: Ultimate Edition
Wallbounce movement and gnasher duels demand real hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Def Jam Vendetta
Human matches turn on predicting grapples versus strikes
Gears of War: Ultimate Edition
Multiplayer is constant positional mind-games around cover
Gears of War: Ultimate Edition leans a little harder on variance, though the gap is small.
Def Jam Vendetta
Nothing hidden once movesets are learned
Gears of War: Ultimate Edition
Weapon spawns timed and known; spread mildly random
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Def Jam Vendetta
Character move pools and reversal systems are mappable
Gears of War: Ultimate Edition
Map control and spawn timing knowledge structure matches
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.