What is the release year for this model?
and what is the difference between this model and the newest one?
This model is from Late 2012. There has not been another "MacBook Pro" since then. It was replaced in early 2013 by the rMBP, or Macbook Pro with Retina Display. The difference with the newer one is more RAM (run more at once), better display (more pixels, better colors, better contrast), and Solid State Drives (faster, no moving components, more reliable, won't break from a drop). Hope this helped!