Yes the U.S. based operation in New Hampsure is small compared to the operation in the Mainland, or even CBQI.
I do not know the extent of the partnership agreement (if any) between SOBUS and UltraChina. Shanghai SVA Computer Co. Ltd is a member of SOBUS. While Legend owned the largest share of the Chinese market in 1999, IBM was right behind them with almost 7% of the market share. Who was exporting the United States? You guessed it: Shanghai. Ironically, Legend is also a member of SOBUS, along with IBM,APPLE, MOTOROLA, etc..
Ultrachina alone is no contender. If the information on the website is accurate, SOBUS is the muscle behind Ultrachina.