I stayed at Samsara on my first trip. Like everyone said, it is budget but it is plenty comfortable and I imagine Legends would be much the same.

The difference is going to be the vibe. You're going to have an easier time meeting people and moving around on the beach. Lots of activity and you will not have any trouble finding good food and drink. The cliffs are going to be more quiet and chill. Both very appealing.

If I was going on my first solo trip, I would probably choose the beach.