Haha they're just different ways of estimating the difficulty of a work task. Story points are a kind of estimate that are represented by a number. The larger the number the more difficult the task.

My company uses WAG (wild ass guess) time estimates where we have to actually say how long we think a task is going to take in a matter of days or weeks. It sounds fine but programming tasks are notoriously hard to estimate since you have to consider so many different factors. I'm especially bad at it so I'd much prefer just saying "this task is an 8 because it seems hard"