Manufacturers generally use the response time as the performance index for dynamic image sharpness. However, there is actually no uniform response time measurement or numerical definition method in the industry, and each manufacturer uses different standards to make claims in respect of their product’s response time. Therefore, any stated response time may differ in comparison to the perceived experience from a gamer's point of view.
A TN panel's fast response comes from its special liquid crystal material characteristics, which provides a clearer and sharper dynamic image quality compared with other LCD panel technologies.
The video below compares the XL2546K (240Hz) with a IPS 240Hz monitor. Both monitors are set at the fastest setting for that monitor. The video shows that the IPS monitor has more image noise because it is unable to handle that speed of response time.