The Google event is Android related and could introduce the LG Nexus 4 and another Nexus phone from Sony. Earlier this month, a prototype of a device called the Sony Nexus X was pictured. Google has opened up the Nexus brandimg to any OEM that can produce hardware that conforms to certain standards. Earlier this month, a French media outlet leaked the October 29th introduction of the LG Nexus 4.
It isn't all about the hardware, either. You can expect Google to introduce Android 4.2 at the event. The latest Android OS build will still be considered Jelly Bean and will bring some new features quite possibly including a quick settings menu.
The Google event will take place at 10am EDT. Microsoft's event will start 3 hours later at 10:00am PDT. Keep your eyes right here to find out what each event will mean for you.