Here are the full comparison tables of Xtool X-100 Pad2 and Xtool X-100 Pad key programmer regrading function and specification.

Function Comparison:

Full Comparison	XTOOL X100 PAD	Xtool X100 PAD2 Standard Configuration/ Full Configuration
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OBDII Diagnosis	No	Diagnosis and immo function cover on the same cars.                                                                     Four System Diagnosis:Engine control module, Brakes, central electrics, airbag.
Immobilizer programming	Yes	Standard Configuration need to pay VW 4th /5th generation immobilizer programming.                                                       Full Configuration Support VW 4th/5th generation immobilizer programming.
Oil Reset/Engine oil light reset	Yes	Yes
TPS Throttle Body Adaptation	Yes	Yes
Odometer Adjustment	Yes	Yes
EPB Electrical Parking Brake Adaptation	Yes	Yes
Steering Angle Calibration	Yes	Yes
ABS Exhaust	Yes	Yes
Battery reset	Yes	Yes
Headlight adjustment	No	Yes
Gear learning	Yes	Yes
TPMS tire pressure warning light reset	Yes	Yes
ECU reset	Yes	Yes
EEPROM adapter	Yes	Yes
Exhaust Gas Treatment (DPF)	Yes	Yes
Air Suspension	No	Yes