They are separate things with different terms, conditions, processes and requirements. You can qualify for one, either, both, or neither, depending on your personal circumstances.
Since you are well past your change of definition with your LTD insurer did you receive the once a year update form or was this out of the blue form you were not expecting?
I believe this maybe the once in a year update form. Although the wording stated they will use the form to decide if ltd should continue. My gp also completed a portion of the form regarding health improvement or deterioration.
They (Canada Life) also said they will be moving my file to group something. (Didn’t quite catch exactly where)
Didn’t think about that and instinctively sent the form to my family doctor. They didn’t have a lot of updates from the specialist doctor and sent whatever they had on hand.
I think in the future I will ask the specialist to send any new reports to my family doctor.
Sounds like you’ve been moved to the maintenance group. Basically you won’t be bothered anymore. You can expect once a year requests for updates and probably not much else. You should have no concern about getting your LTD cut off. And no, CPP and LTD are not related at all to each other.