"Even with the same Seed you'd get a different world today compared to ~a year ago."
You even get a (very) slightly different world if you use the same seed code twice nowadays - Trees, rocks, the layout of the land and the sea shore and some other features can move around a little bit or look a bit different due to their arrangement. (And no, i dont want to be super-clever here; this is just an additional explanation.)

MFG
CKTMC