Well, it was also a tech transfer from Kawasaki (makers of Shinkansen trains), unless you think they bungled the technology, it's very possible these trains at least match the quality of Siemens and Kawasaki trains. You can see the specs and pictures on Wikipedia and decide for yourself.

Like the sibling post says, the tragedy is that they got both companies to give up their tech because each thought the winner would get a monopoly over the entire domestic market for at least a decade or so.