You're right, it is confusing. I wrote a whole comment and deleted it because I thought I knew what it was.
Pico-8 is a fantasy console, and Picotron is a workstation for that console.
Voxatron is a (1) fantasy console and (2) a collection of games but also (3) a game with (4) a game named "Voxatron Story" set in the (5) Voxatron Universe (??)
I played around with this years ago but I do not know where I purchased it so I can't say more. I remember playing around a bit but I don't remember Voxatron Story or anything else of that matter, only the cartridges.
Let me just correct you on something, Picotron is not a workstation for the Pico-8. Pico-8, Picotron and Voxatron are all different beasts. All three allow you to make programs (mostly games) and play them but you cannot play a pico-8 game on picotron and vice-versa. All three have a feature to allow you to download games directly on the device. And all three allow you to export your games as standalones.
Pico-8 is a console, akin to a gameboy, while picotron is more like a computer. You can make games, but programs too. The whole user space is written inside of it.
Pico-8 is a fantasy console, and Picotron is a workstation for that console.
Voxatron is a (1) fantasy console and (2) a collection of games but also (3) a game with (4) a game named "Voxatron Story" set in the (5) Voxatron Universe (??)
I played around with this years ago but I do not know where I purchased it so I can't say more. I remember playing around a bit but I don't remember Voxatron Story or anything else of that matter, only the cartridges.