Tango Key Programmer VS TM100 Key Programmer, which is better?

I was shopping for a auto key programmer. TM100 transponder Key Programmer caught my eye. I inquired customer service for is user manual or instruction. They suggest me buying a Tango Key Programmer with Basic Software instead of TM100 transponder Key Programmer. They made a comparison of this two devices for me.

Item	TM100 transponder Key Programmer	Tango Key Programmer
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Function	cover, read, write and generate transponders; read kilometers, VIN, and transponder type; PIN calculation, 62 key maker modules	cover, read, write and generate transponders; read kilometers, VIN, and transponder type;
Price	US$2,249.00	US$1,679.00
Additional equipment	No	No
Transponder support	Philips transponders, Temic transponders, Megamos transponders,Texastransponders	Philips transponders, Temic transponders, Megamos transponders,Texastransponders, Atmel

  I found that majority car owners support Tango in BBS in aobd2shop. The reason is that Tango Key Programmer is more stable than TM100. Perhaps TM100 remains to be perfect. Finally, I did not ventured to buy a new product but chose Tango instead.