A 1" longer shaft will increase your reach by one inch, Sambo, and there really aren't many other benefits. You may find you're fouling on your practice strokes at first. One inch will not likely affect your cue's balance much if at all, and should make no difference in aiming or stroking. GF
I play with a standard 58 inch cue and unless my arms start growing it wouldn't be an advantage for me to use a longer shaft. I am actually much better at breaking with a 57 inch cue.
I had Jerry Powers of Jerico cues build me a "true" 60 inch cue, very well balanced and since I'm pretty short works extremely well for me--especially on nine footers. Also he put a med. Wizard tip on it and it is the best tip I have ever shot with.
I had a Hagan cue that had longer shafts than butt. The shafts were about an 1 1/2 inch longer. The Hagan cue was exceptional, and I regret selling it.
My current Tad also has shafts that are slightly longer bearly than the butt.
6, half a dozen or another, it isnt that big of a deal IMO.