Compare what survives the new beginning
Check whether the protagonist retains memories, returns to an earlier point, or begins another life with a changed identity. Those details determine what advantage they have and which mistakes they may try to avoid. The broad tag groups related premises; the synopsis should tell you which version applies to a particular title.
Are these all time-travel stories?
No. Rebirth, reincarnation, and a return to the past can use different fictional rules. Some stories emphasize a second attempt at familiar events; others emphasize a changed life or body. Do not assume one mechanism from the collection name alone.