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
A tactical anime shooter testing aim, dimension-shift movement and round-by-round prediction.

Execution · Competitive PvP
Tactical gunfights testing aim, entry planning and prediction of human opponents online.
Strinova leans Execution (Competitive PvP); Tom Clancy's Rainbow Six: Vegas leans Execution (Competitive PvP).
Strinova leans a little harder on execution, though the gap is small.
Strinova
Gunfights plus paper-form movement tech demand sharp mechanics
Tom Clancy's Rainbow Six: Vegas
Aim and snap-to-cover gunplay punish slow hands
Strinova leans a little harder on reads, though the gap is small.
Strinova
Round-based PvP rewards predicting rotations and 2D-form fakes
Tom Clancy's Rainbow Six: Vegas
Multiplayer angles and pushes demand reading human opponents
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Strinova
Minor spread and ability interaction randomness
Tom Clancy's Rainbow Six: Vegas
Terrorist hunt spawns vary modestly between runs
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Strinova
Agent kits, economy and site strategy reward study
Tom Clancy's Rainbow Six: Vegas
Room-entry planning and map knowledge are studyable
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.