I think it is different. In those situations either there is some spiritual connection that actually exists; or its all in their head.
If its the former than we would hope in most cases if the person is actually being morned it was someone who loved them and their motivation would be for the living to go on and live well. As Christian for example, we have 'til death do us part' in the marriage vows because once you are in the kingdom there no longer exists a need for those types of human relationships, your relationship is communion with the Lord. As to if the dead, prior to the second coming, would or would even be allowed to have interest in the goings on back here on earth is a subject of theological debate.
If its all just in your head as far as mourning goes, well then interacting with some mementos and working through thoughts and feelings about your memories of that person is quite different than some interactive simulation of them, which is potentially ingesting new material and generating new interactions with (not) really that person. Think where this can go - you could have a falling out with your deceased grandfather because of his support for a political candidate that wasn't even born before he died. Alternatively you might be able to project your views onto or decide that person would have 'evolved' so you can have your long dead mother tell you how you are being a responsible, good boy, for pressing your girl friend to murder your child still in her womb.
All of this will be quire 'different' and frankly non of it healthy.