NEL trains has a higher crusing speed (75kph as seen from manual
use), due to it operating with overhead instead of third rail, and
also because its using the IGBT-VVVF technology, which is newer and
faster than the old pure GTO thyristor system (not to be confused
with the GTO-VVVF). Max speed wise, ask Alstom, LTA or SBST
The C751B's are the fastest ones on the SMRT system. I do
believe that the Mitsubishi IGBT-VVVF inverter allows the train to
run to probably 130 -150kph or even more if there is no restriction
compared to the older trains which has 95kph max. But crusing speed
is just 40kph.