From the write-up, I believe the ECUTalk one is only monitoring:
Features
ECU part number on connect (23710-xxxxx)
Read fault codes
Clear fault codes
Detect available sensors (metric/imperial options, plus many additional derived sensors)
View sensors on gauges in full-screen mode (or working area option to show taskbar for PC)
Automatic adjustment of gauge size to maximise screen use - useful for widescreen displays
Logging to file (very high rate with decent CPU speed)
Automatic connection and gauge setup on program startup, auto reconnection if lost once in gauges mode
Maybe some bugs even
It says NOTHING about being able to change engine or ECU parameters.
And the other one only mentions the Z-cars, not Titans. I am not certain, but the ECU is different on this truck than on the Z-cars, which can be determined through the Uprev FAQ's on their website.
I personally don't think either one is suited for the Titan, but a quick email or phone call to those companies will settle it. Do that and let us know.