I took it as Mormons believe that they worship the true Christ and Christians worship a false Christ based on false beliefs.
Well, have it your way. But your interpretation does not square with other things that President Hinckley has said.
I took his comment as a figure of speech, meaning nothing more than that we have knowledge about Jesus Christ that others lack. He mentioned specifically the First Vision, in which God the Father and Jesus Christ spoke to Joseph Smith.
But as I said, have it your way. I am really not interested in bickering with you on this.