If you're not planning to use a SIM card, it's better to choose the Wi-Fi-only version, as you won't be using the 5G functionality.
When using Parsec, network stability depends mainly on the quality of your local Wi-Fi connection, but the tablet has a modern processor and enough RAM to ensure a good experience, provided the network is stable.
I'm not completely sure about absolute network stability, as it also depends on your Wi-Fi environment.
To get the most out of Parsec, you'll need a fast, stable Wi-Fi connection.