Here are the table comparisons among OBDSTRA X300 Pro3 Key Master, OBDSTAR X100 Pro and SuperOBD SKP900 auto key programmer.

Tab. 1

OBDSTAR X300 Pro3 (Key Master) vs. SKP-900

S/N	Feature&Function	OBDSTAR X300 Pro3	SKP900 Key Programmer

Hardware	New design in appearance	****	***
	Three-proof design(Water-proof,Shock-proof,Crash-proof), multi-angle shock resistance	****	*
	Industrial screen, clear vision	****	***
	Humanizing design, convenient operation	****	****
	Latest PCB technology, quick download speed	****	***
	Silicon button, comfortable touch	****	***
Software &Upgrade	OBDII function	√	×
	More cars can be supported to adjust mileage
	More ECU matching function deployed with, for example, to replace Toyota/Mit ECM	****	**
	More qualified and stable, and rarely occurs communication failed, For example, matching proximity of HYUNDAI KIA	****	****
	The most coverage of Chinese cars	****	****
	Optional choice offered, such as OIL/SERVICE,EPB and Battery Matching	****	***
	One key upgrade, single model upgrade supported	√	×
	Subaru can be supported	√	×
	EEPROM/read pin code, initialization,data recovery	√	×
	Ferrari can be supported	×	√
	Immo	√	√

Remark:

Five star is the top level

Tab. 2

OBDSTAR Key Master vs. OBDSTAR X100 Pro

S/N	Feature&Function	OBDSTAR Key Master	OBDSTAR X-100 Pro

Hardware	New design in appearance	****	***
	Three-proof design(Water-proof,Shock-proof,Crash-proof), multi-angle shock resistance	****	**
	Industrial screen, clear vision	****	**
	Humanizing design, convenient operation	****	***
	Latest PCB technology, quick download speed	****	**
	Silicon button, comfortable touch	****	**
Software&Upgrade	Immo	√	√
	Mileage	√	√
	EEPROM	√	√
	OBDII function	√	√
	Enable/disable keys for Benz and BMW	√	×
	PAS Pin code reader/Programmer/Mileage	√	×
	Support the latest version of Mazda CX-3,CX-5,Mazda 2/3/6 and no need Pin code anymore	√	×
	Optional choice offered, such as OIL/SERVICE,EPB and Battery Matching	√	×
	One key upgrade, single model upgrade supported	√	√