Differences to in-game descriptions: It is this Wiki's philosophy that any information it provides to the knowledge-seeking Players of Dead by Daylight is easily understandable and accurate.
It is for this reason that the Wiki Guardians take the liberty to rephrase and/or reword descriptions, and bring them in line with how the Unlockables actually work.
The main motivation here are descriptions that are ambiguous and require additional explanations, or whose effects work differently depending on the modifier used (e.g. time vs. speed).
On desktop browsers, the Wiki supports mouse-over functionality for the modifier words used in most descriptions (slightly / moderately / considerably / tremendously).
Either putting the cursor over these words or highlighting them will reveal their actual value(s) in a tooltip pop-up.
On mobile browsers, the values are displayed in small text after the modifier words.
(Unfortunately, this is currently non-functioning due to the move from Gamepedia to Fandom.)