Why is therE a big difference in aging of creation and evolution?

The main difference is intimated by the methods used to work out the age differences.

Creation is part of a story written by people in the Bronze Age in the Middle East which was borrowed from earlier stories which probably originated in, what is now, Iraq, for which there is no scientific evidence.

Evolution is a term normally associated with "On The Origin of Species, by Means of Natural Selection" by Charles Darwin, which has been proved by evidence from many sources in many disciplines.