In real life I’d obviously prefer to be jerked off by the girl to finish.
In porn though, the guy jerking himself off usually results in a better (and more accurate) cumshot. In VR particularly (where the guy can’t make a sound or everyone loses their mind) the scenes where the girl jerks the guy often just makes the cum go everywhere except her face as she’s still wildly jerking when he cums with no warning. When the guy can actually control it himself, you can occasionally get a decent facial.
In summary then, if you want a decent facial, generally speaking, let the guy finish himself off over her face. For everything else (including those bullshit “facials” where the guy is laying on his back) let the girl finish him.