Unless it's onscreen and painfully obvious I just take what the producers say with a grain of salt. I mean, Simon Pegg once said that the Kelvin Timeline changes ran in both directions and altered both the past as well as the future but in canon the changes to the timeline only occur once the Narada goes back to 2233 and events from that moment forward are altered. Unless an episode of SNW openly connects the two Kyles as being the exact same person (the way the series did Robert April with his animated TAS version) then I'm cool with thinking he's another junior officer named Kyle who served nearly a decade before John Winston's.