What is the difference between extentions and powertools when fetching in cache from parameter store?

What is the difference between extensions and powertools when fetching in cache from parameter store?
In the first place, is the mechanism of the cache function different?

I want to use cache for reading from parameter store in my lambda and I am comparing below two features.

• Parameter Store parameters in AWS Lambda functions
• AWS Lambda Powertools for Python Parameters

Please tell us about the main points of comparison.

Supplementary information

• Runtime is python
• I think there is a difference that the TTL setting can be specified for each key or for the entire lambda process