Both 99ms and 6ms are less than a tenth of a second.

The hinge that came with the first couple batches of 11th gen is too weak to hold the monitor in place past a certain angle.

You’re talking about less than a tenth of a second. Even if some part of your cognition is able to react that fast, you still have every other aspect of play to worry about. Maybe polish up your fundamental skills before worrying about capitalizing on that missing tenth of a second.

You can probably notice a difference through a very carefully constructed and controlled benchmark. In gameplay? I doubt it.