The only way in perception over a 4ghz 920 running the latest and greatest is in benchies and encoding tasks. Or photoshop rendering. Even then we are talking very little in terms of a 4 year gap in tech.
In games I would argue that a 920 @ 4ghz and the latest chip at the same speed with the same GPU would not be noticeable on a blind test.
In games I would argue that a 920 @ 4ghz and the latest chip at the same speed with the same GPU would not be noticeable on a blind test.