The point is that yes, all of this can be done with Google operators.
These are just links to those operators.
These are just links to those operators.
But there are some other subtle differences: you get thumbnail images with search results (if available) with Blades, and you don't get a captcha to prove you're human if your search volume or rate is out of bounds on a Blade. (These are features of CSEs, not something I've hacked.)