So, the map ordered from the US at 50% off worked fine on my Forte Koup here in Canada.
In addition to the map update, the interface has a few new tweaks as well, but the installation takes quite a long time and cannot be interrupted. The instructions stated it could be as long as 150 minutes. I thought this sounded ridiculous and asked them about it when I got my installation code and she said it was how long it *could* possibly take. Suggested I leave the key in the ignition and hook up a battery charger. Yeah, not gonna do that.
Anyway, some other Kia vehicle posts on the OEM nav stated it took about an hour, so I started it up for my commute home (which is usually around 45 minutes) and I only had to wait in the driveway for maybe ten minutes for it to finish up when I arrived, so that's about right. Made for a boring drive as the entire head unit is offline while it updates, and you lose your radio presets, but your navigation points and settings (home, favourites, etc) stay in place.