Cap'n Kobold
Hero
I suspect that they are the same thing.
The Alchemical artificer is at least usable as is in Eberron, even if its a weird take. The Gunsmith isn't suitable as written, but can be tweaked into a wand/staff blaster artificer without too much effort.The UA alchemical and gun-totting Artificer was more appropriate for Forgotten Realms than the artificers of Eberron, so woe to Eberron and its artificers if your suspicion bears fruit.
Turning the Artificer into a tinker and mechanic suitable for Lantan however, would probably make it harder to fit into the magical technician concept of the Eberron artificer however.