There's a lot setting these two pieces apart, both are great products but The Gift teaches more material.
First, the bands magically tie themselves into a bow. Then that bow bounces from rung to rung. The bow jumps around a lot, in a sequence that is a bit more complex than Stairway.
You then have a fun give away at the end, with the Gift.
With Stairway, you get one routine with a couple small variations. Basically the bill bounces from rung to rung and your are done. Both are great routines but more is offered in The Gift.
I should mention as well that not all phases are interchangeable. Don't think that you will be able one after purchasing the other.