You may have recently read the comparison that was put out by STAB.  It's currently posted on several sites.  Below is the actual email from the SG2100 engineer.

Hi Tim 1. Wind Resistance: According to the structure of SG2100 it is also good for 140Km/h with 90cm Dish. 2. Corrosion Resistance: The treated screws we used can pass the Salt-Spray test for 300 Hours. 3. Temperature: Sorry we didn't mentioned it on our spec. We have made many tests and the SG2100 is good for -40degrees C to +80 degrees C. We will add it onto our spec. 4. Sensor: One sensor is already good enough. Only the one who can't write good software need 2 sensors to reduce the possibility of miss counting. Besides, the count's precision of SG2100 is 0.0256 degree but not 0.15 degree as STAB mentioned. 5. Precise '0' position: As everybody knows that SG2100 has very precise 0 degree reference. We use very smart software to calibrate. No need to adjust the mechanical parts of SG2100. 6. USALS: USALS is only a software for the receiver to calculate the Azimuth angles of the motor according to the Latitude, longitude of the end user and the Satellites want to aim. We have the same tool in our website. We call it GAAPS (Global Automatic Antenna Positioning System). All the end users can use this tool via http://www.gaaps.com.tw . We will prepare more information for easy installation with the help of GAAPS in the near future. 7. Power Consumption: Since the output power of the Receiver is at least 350mA, 180mA consumption will not cause any problem. The reason we set the consumption higher than others is to offer low backlash at any azimuth angle of SG2100. STAB has lower consumption, however, the backlash is very large while the motor is close to 0 degree. STAB wants to hint that higher price is equal to good quality, however, it is not true for the market. It is a responsibility of a good enterprise to offer good quality with better prices, right?

FEATURES: Fits all popular dish with 42mm tube, including Winegard Special Design for any Receiver with DiSEqC 1.2  Only One Coaxial Cable Control  Go To X Function  High Efficiency  Compact Structure  Ultra Low Noise  Adjustable Hardware Limits  Easy Installation with LED Indicator  Manual EAST / WEST button  For Dish up to 1.2M

Specification: Model SG2100 Antenna Diameter 1.2M Max. Azimuth Angle 70˚EAST ~ 70˚WEST ( 140˚ ) Adjustable Elevation Angle 25˚~75˚ Input / Output Voltage 13 / 18 VDC Power Consumption 50 mA ( Standby mode )  200 mA ( Normal) 350 mA ( Max.) Rotation Speed 1.9˚ / sec ( at 13V) ; 2.5 ˚/ sec ( at 18V) Satellite Positions 60 Connector F Type Command Protocol DiSEqC 1.2 Resynchronize Function YES Goto Position 0 Function YES Goto X Function YES Positioning Sensor High Resolution Hall Effect Sensor EAST / WEST Limit Adjustable Hardware and Programmable Software Manual Button EAST / WEST Indicating LED YES color status indication Green On Power On; Standby Mode Orange Blink Receiving DiSEqC 1.2 Commands/ Reset Mode Orange On Error Message: Over Current / Hardware Limit Tube size for antenna 55x160mm Stand size 35~65mm