I'd expect the Public version to be a different build. There's a few bugs that didn't get squashed in the GM and they had to have the GM sent out to carriers weeks ago so it's very possible today is similar to last year I believe where we get a .1 bump.
Also unlike before apple if fully intending on updating iOS 8 more often this year for example we know we are getting an update in Oct for apple pay and hopefully split screen on iPads and another update next year for the apple watch.
I also suspect whenever Yosemite is done we will also see an iCloud app and of course we need an update to turn back on SMS relay however that may be a switch that can be turned on and off on apple's end without an update.