Perspective = the context/light in which the user sees/judges/perceives the product, Perception = how the user sees/perceives the product.
What is the difference between perspective and perception?
Perception is what you interpret. It is your understanding of a given situation, person, or object. It is the meaning you assign to any given stimulus. Perspective is your point of view.
What is user perspective?
User perspective refers to the perception of a given user and the way in which they are going to interact with the final product, such as an application or a website.