Unity Gambling Solution

You can check out the diffrences between these two APIs on their official docs pages. For instance, here https://docs.unity3d.com/ScriptReference/XR.InputDevice.html you'll find the info on Unity Scripting API, and here's some info about OddsMner http://linked-web-apis.fit.cvut.cz/resource/page/oddsminer_api

Unfortunately your question is quite broad. If you mean multiplayer, try learning about c# UdpClients and TcpListeners, if you mean random change, there is a built-in random system to unity.