UltraGauge or ScanGauge

I know I'm probably beating this like a dead horse, but I have scanned through TW and read many reviews about the UltraGauge and the ScanGauge. But I can't determine the best route to go. Can anyone help me with this decision, I really need this gauge to observe Trans Temp, engine temp, MPG,...I tow a TT and I need to watch these temps closely...

Any Help would be greatful

 

To this I will add:

SG is smaller and easier to mount inconspicuously, but only has room for 4 monitored items and they are all numeric displayed

UG is larger and harder to find an out of the way spot, but has a better display, can monitor 6 items (I think its 6) and has options for an analog display for a couple of them.