I knew exactly what you meant and even copied your typo! My eyes must have been more tired than your fingers! Hilarious!
But, back when I was rolling tubes in a Foreplay 2, I landed on the 5814A, too, although I never took the time to try to articulate why. I have since laid in a small supply of them. I don't recall if they are the JAN version, but I have never run across anything I liked better. I think there was a time when RCA was turning out so many tubes that their consistency was way up just from sheer numbers. Whatever the reason, I now have used them in a couple of pre-amps and several customer guitar amps (yes, not every guitar amp uses high-mu tubes everywhere). And, of course, my RCA VTVM uses one!