People throw out the term productivity all the time so it has earned a negative connotation.
Productivity is a process- do it better, faster, cheaper, with more quality. Success is a result- when your efforts work out well.
You can be successful without being productive- think of digging a large hole with a spoon. You can be productive without being successful- think of digging efficiently with a shovel for a treasure, but in the wrong spot.
To maximize your machine you must identify success and get there in the most productive way possible.
Ultimately success is most important (as evidenced by the name of this blog)- because if you aren’t succeeding you aren’t getting anywhere.