i have nothing to base my opinion on other than the fact it is what i have always had in my cues. 5/16 18 into a brass insert. when i had dick neighbors make my cue it's the pin i asked him to put in. it's not his standard but it's what i asked for. almost every cue i've ever owned had one so it's what i stuck with. i have owned and shot with a joss that had a 5/16 14 piloted (i think) and i just didn't like the cue. i think that had more to do with the balance and weight of the cue, but when it came time for a custom i figured i would get the pin i had used the most.
i don't think there is any real difference in any measureable way. and for the casual player, i think they'd be hard pressed to hit six cues and tell you if they had different pins.
i don't think there is any real difference in any measureable way. and for the casual player, i think they'd be hard pressed to hit six cues and tell you if they had different pins.