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
Destructible-environment shooter with tight gunplay.

Execution · Competitive PvP
Twitch ball control plus constant prediction of human defenders on known maps.
Battlefield: Bad Company 2 leans Execution (Competitive PvP); TagPro leans Execution (Competitive PvP).
Battlefield: Bad Company 2 leans a little harder on execution, though the gap is small.
Battlefield: Bad Company 2
Bullet drop and recoil demand real aim
TagPro
Ball handling, boosts and juke precision decide grabs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield: Bad Company 2
Destruction and flanks punish positional reads
TagPro
Human defenders adapt to your routes every match
Battlefield: Bad Company 2 leans a little harder on variance, though the gap is small.
Battlefield: Bad Company 2
Some vehicle/spawn randomness, mostly skill
TagPro
Maps and power-up timers are fully visible
Battlefield: Bad Company 2 leans a little harder on optimization, though the gap is small.
Battlefield: Bad Company 2
Class kits and gadgets optimize objectives
TagPro
Map routes, button plays and power-up timing 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.