I looked at both the BBQ Guru CyberQ WiFi and the Rock's Bar-B-Que Stoker.
I bought myself a CyberQ WiFi for Christmas with the 10 cfm Pit Viper fan and WSM adapter.
I chose the CyberQ WiFi ATC system, but by all accounts the Stoker also works well.
The CyberQ WiFi is basically a WiFi version of a DigiQ DX2 with 3 food probes.
I've done a few cooks on it and it works great.
Here is a mini review I did.
http://tvwbb.com/showthread.php?38611-CyberQ-WiFi-First-Cooks&p=389683#post389683
Here is the adapter mod I did to my WSMs.
http://tvwbb.com/showthread.php?38145-BBQ-Guru-Adapter-Mod&p=383332#post383332
The CyberQ WiFi can only control one pit at a time, though it does support three food probes.
The Stoker can simultaneously control more than one pit.
If you need multi pit capability, the Stoker is for you.
The CyberQ WiFi has Ad-Hoc mode, which allows you to easily configure and access it.
The problem is not all Android devices support Ad-Hoc mode. My Samsung Galaxy SIII does not support Ad-Hoc mode.
Details.
http://tvwbb.com/showthread.php?38047-CyberQ-WiFi-Android-And-Adhoc-Mode
The Stoker has an ethernet jack allowing you to wire it to an ethernet switch with a patch cord for easy configuration.
Both units do the following.
Are sold in systems with various pit adapters and fan sizes.
Can be manually configured from the front panel.
Come with an AC adapter.
Have a backlit LCD display.
Have a built in web interface.
Have different probe wire lengths available.
Have food and pit alarms.
Support full wireless LAN and internet operation.
The Stoker comes with 1 - 4' pit probe and 1 - 4' food probe.
The CyberQ WiFi comes with 1 - 6' pit probe, 3 - 6' food probes and a mounting bracket.
The CyberQ WiFi will operate directly on a 12VDC source.
The Stoker requires a 5VDC to 12VDC converter to use on a 12VDC source.
The CyberQ WiFi has a plastic case with a built in antenna.
The Stoker has a metal case with an external antenna.
The CyberQ WiFi sends alert e-mails.
The Stoker sends alert tweets to your Twitter account.
The CyberQ WiFi fan has a manual damper.
The Stoker fan has an automatic close/open damper.
The CyberQ WiFi has automatic open pit detection.
The Stoker has a manual open pit timer.
The CyberQ WiFi has a ramp cooking mode.
The CyberQ WiFi fan is easier to install and remove from it's pit adapter.
The CyberQ WiFi pit adapter comes with a kill plug.
The CyberQ WiFi is easier to congigure than the Stoker.
The Stoker has status lights on their device plugs.
The Stoker has more aftermarket software support than the CyberQ Wifi.
For a comparable system, the CyberQ WiFi is less expensive than the Stoker.
Good luck.
Bob