I can definitively answer the question you asked, but I'm not sure it's actually the question you have in mind.
As with everything in life, there is a huge difference between what I NEED
vs. what I WANT
Alot of people, have been catching alot of fish, centuries before today's technological marvels were ever even dreamed. Even a $25 Eagle Claw Featherlight rod exceeds what you need to catch fish. (As an aside, I actually enjoy fishing my $25 Eagle Claw.)
Answering what you need
to fish is the easy part, answering what you want
to fish is the harder part. For much of my fishing, I'm not sure I can argue that I would catch any more fish using a $700 dollar rod rather than a $25 rod. The $700 rod definitely feels different than the $25 rod. Does it feel better or worst, I'm not sure, I just know it's different.
For the sake of discussion, let's say it does indeed feel better, does it feel $675 better? Again, I don't know. I'm not sure anyone can answer that question for any of us, we can only draw our own individual conclusions.