The problem with using the single census map for Vancouver is exactly that... you can't compare with other places like Calgary, which has an LRT system.
So... I went ahead and looked all over Statistics Canada for the info. However, I couldn't find it. Luckily, there were two other maps (or animations that is) that contained similar info:
35 Years of Population Change in Calgary
35 Years of Population Change in Vancouver
With the two maps at hand, it was easier to make a comparison, although the maps don't have scales for some reason.
Things I noted:
- The NE corner densified rapidly around the time that they built the LRT, but the density hasn't changed much since then.
- In other areas it was easy to see that the LRT's construction also indirectly increased the density in some areas, although not by a significantly high degree
- Surrey in contrast does have much more "red zone" density than Surrey, especially in the "eight-figure loop" area encompassing Whalley, Guildford, Fleetwood, Nordel, Newton, and Scottsdale... and this is without LRT or improved transit to begin with.
I therefore concede that SkyTrain, rather than LRT, would be the best choice in the aforementioned eight-figure Surrey loop area.
Having said that, areas outside the eight-figure loop (Cloverdale, Langley, White Rock, and Semiahmoo) have much less density and would be better served by an LRT system. I also still believe that the entire Broadway corridor should be upgraded due to its higher local density and importance... and the improvements should be done in one massive step to avoid inconvenient transfers.