Difference between GM Tech 2 and GM MDI

Difference between GM Tech 2  and GM MDI:

Content	GM Tech 2	GM MDI
Language	GM-English, Germany, Spanish , Japanese, French, Thai , Portuguese, Korean SAAB-English OPEL-English, Italian , Germany,Spanish HOLDEN-English SUZUKI-English ISUZU-English	Multi-language: English, French, German, Japanese, Italian and so on. Total 30 languages to choose.
Update	Via 32MB Software Card	can not update
Activation	no need active	yes
Advantage	cannot plug original software card, but can support original program	can support software from original factory
OS requirement	no need connect to the PC	Win XP only
Internet connection	no need connect to the PC	can not connect to the internet then install the software, because once connect internet, it will remind you update the software
Support Car Model	Cannot support truck, only for cars, Support all GM systems 1992 thru current year. such as GM/ SAAB/ OPEL/ SUZUKI/ ISUZU/HOLDEN	MDI can test all GM car from 1990-2012 year.
Support programing	support reprogramming, but need to use with TIS2000 together	support offline program,such as chevrolet,opel, but not for all cars