won't know the difference vs won't tell the difference

Both phrases are correct, but they have slightly different meanings. 'Won't know the difference' implies that someone will not be able to perceive a distinction between two things, while 'won't tell the difference' suggests that someone will not reveal or communicate that they can perceive a distinction.

Last updated: March 20, 2024 • 990 views

won't know the difference

This phrase is correct and commonly used in English.

This phrase is used to express that someone will not be able to perceive a distinction between two things.

Examples:

If you use the cheaper ingredients, I promise you won't know the difference in the taste.
She won't know the difference between the two fabrics unless you point it out to her.

Show examples from the web [+]

You Won't Know the Difference So You Can't Make the Choice. says Robin Beck. Which pill, red or blue? I propose that it does not matter which pill one takes ...
Mar 4, 2014 ... By The Time Your Car Goes Driverless, You Won't Know The Difference. Updated March 20, 20149:23 AM ET Published March 4, 201411:00 ...
Cato, play with my head. I won't know the difference. If we're living in the novelist or statistician. Cato, mess with my concepts, my inner vision. Like a strobing ...
May 9, 2007 ... 9mm - You Won't Know the Difference. Tahoe1LT. SubscribeSubscribed Unsubscribe 1010. Loading... Loading... Working... Add to ...

Alternatives:

won't be able to tell the difference
won't notice the difference
won't distinguish between
won't perceive the difference

won't tell the difference

This phrase is correct and commonly used in English.

This phrase is used to indicate that someone will not reveal or communicate that they can perceive a distinction between two things.

Examples:

Even though they look similar, most people won't tell the difference between the two paintings.
He won't tell the difference in quality unless you ask him directly.

Show examples from the web [+]

3 days ago ... ... the difference today they won't tell the difference in a month or a year. A-B tests may be designed to show that subtle differences don't matter, ...
Jul 17, 2015 ... ... trans, just keep it on, you won't tell the difference overdrive vs drive overdrive and drive relates to the power train and transmission of a car.
You won't tell the difference til it's gone. And you got nowhere to go. You just follow where it flows. Don't it break you up? Can't feel your empty heart. Everything ...
If you have an auto OD on an auto trans, just keep it on, you won't tell the difference. Do not keep it on if you are towing a boat or trailer, but you can use it once ...

Alternatives:

won't reveal the difference
won't communicate the difference
won't disclose the difference
won't express the difference

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won't know the difference vs won't tell the difference