No. The main diference is that you write a software for Android, it doesn’t work in gnu/Linux (without extra layers), but if you write a software for steamOS, literally you are writing a software for gnu/Linux. SteamOS is an arch Linux modified to be immutable with a custom (and free) kernel with extra support that they merge after in mainline, with the steam app oppened by default.
SteamOS use all the software stack for gnu Linux. Android develop their own stack and work different.
No. The main diference is that you write a software for Android, it doesn’t work in gnu/Linux (without extra layers), but if you write a software for steamOS, literally you are writing a software for gnu/Linux. SteamOS is an arch Linux modified to be immutable with a custom (and free) kernel with extra support that they merge after in mainline, with the steam app oppened by default. SteamOS use all the software stack for gnu Linux. Android develop their own stack and work different.