The difference in content check latency in websites is done using the Webpage Speed (Browser) feature by configuring the "Website Type > Dynamic".
In websites, the content match occurs immediately during the poll. There is no waiting time for the page to load. However, in case you opt to have the content check executed after a small wait time of 5 seconds or so, you can opt for the Webpage Speed (Browser) feature wherein we wait for 5 seconds before the content match action is performed.
Click here to know how to add a Webpage Speed (Browser).