There does not seem to be an appreciable difference between SC 2.4.4 and 2.4.8
Clarify the SC
We have reworded both SC 2.4.8 and SC 2.4.4 to clarify the differences. They now read:
2.4.4 The purpose of each link can be determined from the link text and its programmatically determined link context.
2.4.8 The purpose of each link can be identified from the link text.
where "Programmatically determined link context" is defined as:
programmatically determined link context
1. Additional information that can be programmatically determined from relationships with a link; and
2. can be extracted, combined with the link text, and presented to users in different modalities.
Example 1: Screen readers provide commands to read the current sentence when focus is on a link.
Example 2: Examples of information that can be extracted, combined with link text, and presented to users in different modalities include text that is in the same sentence, paragraph, list, or table cell as the link or in a table header cell that is associated with the table cell that contains the link.