What is the difference between GODIAG GD201, GD202 and GD203?

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GODIAG GD201 VS. GD202 VS.GD203
GODIAG GD201 is Full System Diagnostic+ 29 Service Reset Functions
GODIAG GD202 is Four System Diagnostic+11 Service Reset Functions
GD203 is ABS System Diagnostic+ 29 Service Reset Functions
 

Product name	GODIAG GD201	GODIAG GD202	GODIAG GD203
Price	US$295	US$189	US$169
OBDII	√	√	√
Supprted Diagnosis System	ALL	ENGINE/AT/ABS/SRS only	ABS/SRS only
Supported Car makes	80 vehicle makes	80 vehicle makes	80 vehicle makes
Special Reset Functions
ABS BLEED	√	√	√
BRT	√	√	√
EPB	√	√	√
INJECTOR	√	√	√
Oil	√	√	√
SAS	√	√	√
DPF	√	√	√
SUSPENSION	√	√	√
EGR	√	√	√
TCM OIL	√	X	√
EVAP TEST	√	√	√
GEAR LEARN	√	X	√
IMMOBILIZER	√	X	√
TPMS	√	X	√
TPS	√	X	√
SUNROOF	√	X	√
GEARBOX	√	X	√
AJUSTE FUEL	√	X	√
AFS	√	X	√
CLUTCH ADAPTATION	√	X	√
Language Change	√	X	√
SEAT MATCH	√	X	√
Turbo	√	X	√
Windows& Door	√	X	√
PFP	√	X	√
ATADAPTION	√	X	√
AIRBAG	√	X	√
CHANGE TIRE	√	X	√
ODOMETER	√	X	X
UPDATE	Lifetime free update	Lifetime free update	Lifetime free update
LANGUAGE	17 languages available: English, German, French, Thai, Russian, Polish, Korea, Japanese, Swedish, Hungarian, Slovak, Spanish, Portuguese, Dutch, Italian, Simplified Chinese, Traditional Chinese	17 languages available: English, German, French, Thai, Russian, Polish, Korea, Japanese, Swedish, Hungarian, Slovak, Spanish, Portuguese, Dutch, Italian, Simplified Chinese, Traditional Chinese	17 languages available: English, German, French, Thai, Russian, Polish, Korea, Japanese, Swedish, Hungarian, Slovak, Spanish, Portuguese, Dutch, Italian, Simplified Chinese, Traditional Chinese