Ideally there should be no confusion between mirror effect and reflection. But an ordinary client cannot make out the obvious difference. A mirror effect needs understanding so that it can be applied to an image rightfully.
Is mirror effect anything different from reflection? This is a question many clients are faced with because to some extent they both tend to serve similar purpose. Both these techniques are used to add depth and volume to an image. Once these digital illusions are introduced, the image seems to be having a multiple dimension. Both are as different. A shadow is different from mirror reflection in physical world. This is reason these digital services cannot be used together or can be replaced with one another. Ideally they should be applied to objects with specific objectives in mind.