Question

Is sexual selection the same as Natural selection or is there a difference?

Answer 1

I don't consider them the same, and I'm gonna try explain why:
Sexual selection is a evolution-mechanism that base it self on the pairing selection.
Natural selection is a evolution-mechanism that base it self on the individual's adaptation to the surrounding environment.

The best example is to consider the beautiful feathers of the peafowl which are very unhelpful when trying to escape a predator.
Another example, but not as good could be antlers for deers. They are just causing trouble and being energy expensive.