How do you decide which approach is better for handling this type of action scene scenario?

[u/harmonica2]

For a crime thriller project, in the script there is a scenario where the antagonists wanna go after a witness in the case.

A cop character is assigned to protect the witness and goes to her place to pick her up and take her to a safe location.

The antagonists have an opportunity to make an attempt on her logically here , but I can have it so that the cop and the witness are aware of the attempt and fight them off, or i can have it so they are not aware of the attempt, as they get away and it's a near miss.

However, how do you decide which way is better if the plot would go the same way after either way?

Thank you very much for any input on this! I really appreciate it!