You disregarded all of the other vehicle differences I mentioned...But the subway is all TTC gauge. Therefor, they are streetcars? That is my problem with the Crosstown. It is not an RT any ore than St Clair or Spadina is, but we are being convinced it is for something that could be argued out by existing equipment and construction.
Your question works both ways: the RT and T1 trains both use the TTC gauge, are they streetcars?
The trains on the Crosstown share as many features with the TTC subway trains as they do with TTC streetcar rolling stock. For example, the Crosstown's Flexity Freedom has doors on both sides, so it can support both center platforms and side platforms at stations, like a subway train. They are also expected to be coupled together into longer trains, like a subway train. They are going to be automated inside the tunnels, like the subway. And so on.
The point is: You can't slap a dedicated lane on a regular bus or streetcar and pretend they are now BRT and LRT. St Clair or Spadina's streetcars cant do any of the above. Hence they are not called LRT in Toronto. (even though they tried to brand Spadina at launch as an LRT and it only caused confusion. That's another matter)