Difference of tv_ProjectSaveSequence and tv_SaveSequence?

[Gary]

I've gotten confused a couple times, trying to render the "Camera" view with George only to realise I was accidentally using "tv_SaveSequence", which doesn't have the camera parameter.
As far as I can see in the docs, that and the "LACE" parameter (which tv_savesequence has) are the only difference mentioned. But is there more of a difference? Is tv_PSS somehow tied to the project in a way tv_SS isn't?

[Gary]

I have since discovered that it seems like tv_ProjectSaveSequence doesn't let you export frames that are outside the explicit frame range of the project (even if the clip is longer than the project).