I also looked at the Chinese unit & found it is a knockoff of the Italian testers. If you read the brochure it is,word for word,the same as the Italian units. You are correct,they only supply software,which is SD3,however,they claim that it can understand SD2 "in emulation mode". Such qualifications make me wary of considering them further. Fortunately I have access to a Leonardo tester & it does everything in SD2.
Lots of testers in the USA for SD2 in Ferraris,I'm not intelligent enough to understand whether they would work on a Maserati. If others on this forum have used these units I'd be interested to see the details.