Which is better for a kitchen?

The Desobry. It plugs in, has Wi-Fi and Android apps, and the headphone jack keeps noise down. The Rywob's battery is more useful outdoors.

Which lasts longer away from power?

The Rywob, since it is the only one with a battery. Its 1800mAh cell is small, so expect short runtime and plan to recharge often.

Is the Rywob worth stepping up to?

Only if you need battery power. The Desobry gives you smart apps, more ports and a headphone jack for less hassle at home.

Which has the better picture?

The Rywob lists an IPS panel, LED backlight and 800 x 480 resolution. The Desobry does not state its resolution, so the Rywob's specs are clearer on paper.

Can I use a streaming stick with either?

Yes. Both have HDMI, so a Fire Stick or Roku works. On the Desobry you may need two remotes for power and volume.

Which is easier to carry?

The Rywob, because it runs on battery and includes a stand. The Desobry is light but needs an outlet and adapter.

Desobry 12" Small Smart TV vs Rywob 12-Inch Portable TV

Buy the Desobry if you want a true smart TV with Android 14, Wi-Fi, streaming apps and a headphone jack for a kitchen or bedroom. Buy the Rywob if you need a battery-powered set that runs without an outlet for camping or an RV. The Desobry has the software and connectivity edge; the Rywob has the portability edge. Both are small 12-inch LCDs, so expect modest picture quality and small text on screen.

Choose the Desobry if you want built-in Wi-Fi, Android 14 apps and a headphone jack in a small plug-in TV.
Choose the Rywob if you need a rechargeable battery and a stand so the TV works away from power.

Prices

Desobry 12" Small Smart TV: $159.99 at Walmart (checked today)
Rywob 12-Inch Portable TV: $98.99 at Amazon (checked today)
Difference: the Rywob 12-Inch Portable TV is $61.00 cheaper than the Desobry 12" Small Smart TV today