Your details must be consistent for any visa application.
If for example, the tenure of your employment in your TFW application was different from your employment certificate and/or cannot be matched to your tax returns/bank statement then this will be considered as misrepresentation or falsifying information. It's the same for salary or job titles.
Yes, changes will be noticed after all visa office staff do go through an application in-depth before issuing visas.
I strongly recommend you inform IRCC of any incorrect/false information in your TFW application BEFORE IRCC notices these variations. Use a CSE + email for this.... and keep records that you have informed them when you apply for another visa. Do not risk a 5 years ban for misrepresentation
IMO, it's better to be safe than sorry