I just discovered that the music in Sachen's "Street Rider" for GB is credited to a "Wang Yuen Lii", according to the GBS rip. Which I'm guessing is probably an alternate romanization of Wang Yue-Li... and which further suggests that this is probably the same person as Amadeus Wang, or at the very least, had a Sachen connection.
Edit: OK, definitely the same guy-- the GBS is a typo. It's spelled as "Wang Yueh Lii" in the ROM.
Interestingly, Ma Shyh-Dwo is credited as "artist" in this game. And the "scheme" is credited to someone known only as "LC" (LC Tchacvosky?). Does this mean the two Sachen dev teams worked together while Sachen was still Commin, perhaps?
Looking at various Sachen games, I notice that Amadeus sometimes has a middle initial of "Y" (as in "yue") and sometimes of "L" (as in "li"). Gotta be the same guy...