Which death would rate as being worse the murder of a 75+ senior or a child under 10yr?

Though both deaths would are a tragedy which would logically be worse, to have someone who is 78+ years or a child under 10 murdered? If you take into account the senior person they have lived 7 decades or more, they most likely have children, grandchildren and in some cases great grandchildren. To have lived a maybe productive full life to have it all end by violence would seem a shame. However, to be under 10yrs and die by violence you have not really yet lived and been productive in society. The tragic part is all that would be missed and the potential that will never have a chance to be explored. So, is the younger death really worse? I think many will believe it worse because of who the person was and not what he/she actually did. Is it worse that part of the liability of the young of not having been here long enough to impact the world in a major and tangible way might be one of the largest assets, they have not been here to screw over anyone. So is the greater death cheating a senior out of a natural death when they have done everything near right to make it that old, or a child because of the innocence of not having had the chance to do much dirt and the potential to contribute greatly has been stolen from society? To each sets of families it is a given they feel a big loss.