Spoiler alert: while it's not *great*, it's not dramatic either. The only thing you're missing out on by using the wrong mark package is the low-level bootloader/kernel updates. Which is likely a moot point for an Aura One because it's EoL, so those won't get updated ever again.
But, yeah, it's as easy as installing it on top of what you currently have. And it won't change anything as they're exactly the same
.