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Comparing a Light Metro project which is largely at-grade or even within an existing ROW (with a relatively short tunnel being modernized) with an LRT project which is dug into the ground for half its length doesn’t really appear to me as a valid and fair comparison.

I would believe that the Skytrain is a much more valid comparison, but it also seems to suffer from high construction costs recently:

To compare, the per-km costs of the early stages:
 
Comparing a Light Metro project which is largely at-grade or even within an existing ROW (with a relatively short tunnel being modernized) with an LRT project which is dug into the ground for half its length doesn’t really appear to me as a valid and fair comparison.
There's other comparison issues as well. The Eglinton costs include 30 years of maintenance - and I don't know how much for operation; how many years of maintenance/operation are included in the REM (and Vancouver) numbers? And do the Montreal numbers include the 4-km of structure that was part of the Champlain Bridge construction in the cost (or just the denominator)?

For Vancouver, the Broadway subway cost would be a better comparison - though I doubt that includes decades of maintenance.
 
For the Vancouver extensions, maintenance would not be included because those ones are not P3s run by a separate operator (they are true extension to the existing TransLink operated lines).
The Surrey one might include the new storage yard, but that could be costed separately.
 
For the Vancouver extensions, maintenance would not be included because those ones are not P3s run by a separate operator (they are true extension to the existing TransLink operated lines).
The Surrey one might include the new storage yard, but that could be costed separately.
Line 5 and Line 6 are also run by a separate operator. There's a difference between operator and maintenance. (the operator isn't even maintaining the vehicles!).

(that's not really your point though). It does make apples and oranges comparisons difficult. Even more traditional big costs like land acquisition, design, vehicle acquisition (and yards), may or may not be included in easily accessible public numbers. Sometimes vehicles were purchased a decade earlier, with an eye to a future use!
 
New exo Charger has arrived (Unit 1400)!!!

In Boone, Iowa:
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c43f1dc7270ef3a60fd9d8048c937b92b832cfdc.jpeg


In Montréal:
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Credit: @Filyx20 on AgoraMTL
 

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