Still no response from W.K. Lis. You write about how many streetcars to use as if it's a fait accompli. Why streetcars? Think about it. Why shouldn't this line use the subway technology that has been so successful in Toronto, especially on a line that would be completely grade-separated anyway? Why would we use vehicles that are 25% narrower than Toronto's existing subway trains? Longer stations are a hell of a lot more expensive than wider ones.
As you said, a single subway car carries 315 people. According to the Bomber, the streetcars we're ordering can carry 246. Again, as you said, a standard six-car subway train can carry 1,890 people. Five LRV cars, which would be longer than the 6-car subway train (meaning more expensive stations), could only carry 1,230 people.
But wait, there's more! The new subway cars cost about $2.9 million apiece. The new LRVs with (being generous) approximately the same capacity as a subway car will cost $6.8 million apiece. The economies of light rail!