You cannot optimize every path before selecting one.

Full comparison is impossible because each path only reveals its real texture once you are on it. Trying to perfect every option before choosing means doing enormous work on roads you will never take, and arriving at the decision exhausted. The optimization has to happen after the commitment, not before.

Narrow your options to a workable few, then choose on the basis of what you can actually know now. Save your effort for improving the path you take. You will learn more about it in a month of walking than in a year of comparing.