Forget suburbs... lets compare urban core densities to Brampton instead.
Brampton has 348,045 people living in census tracts with densities of over 10,000 ppsm. That's 58.6% of Brampton's population.
Most of the rest of Brampton's population lives in census tracts that would have densities of over 10,000 ppsm if their census tracts didn't also include large areas of farmland, industrial parks and/or conservation areas.
Of those, 348,045 people, 149,108 live in census tracts with densities of over 15,000 ppsm. BTW about 85% of those 15k+ ppsm census tracts have
zero highrises.
The entire Metro Detroit area has 14,254 people living in census tracts of >15,000 ppsm (10.5x less than Brampton). It has 97,417 people living in census tracts of >10,000 ppsm (3.6x less than Brampton). Mostly in Downtown/Midtown, Hamtrack, Dearborn and SW Detroit.
Pittsburgh MSA
>15,000 ppsm CTs: 37,522 people (4.0x less than Brampton)
>10,000 ppsm CTs: 97,391 people (3.6x less than Brampton)
St Louis MSA
>15,000 ppsm CTs: 0 people
>10,000 ppsm CTs: 64,309 people (5.4x less than Brampton)
Portland MSA
>15,000 ppsm CTs: 34,423 people (4.3x less than Brampton)
>10,000 ppsm CTs: 165,678 people (2.1x less than Brampton)
Las Vegas MSA
>15,000 ppsm CTs: 65,173 people (2.3x less than Brampton)
>10,000 ppsm CTs: 392,304 people (1.1x
more than Brampton)
ok that's something I suppose. Except that the Vegas MSA has about 3.7x more people than Brampton, and the high density development in Vegas is scattered all over the place, so there's still a lot of low density in between the dense clusters. If you compare weighted densities, Brampton is still about 80% denser, which should be enough to make a difference in what kind of transit you can provide.
Dallas-FW MSA
>15,000 ppsm CTs: 148,285 people (same as Brampton)
>10,000 ppsm CTs: 351,675 people (same as Brampton)
Except that DFW has more than 10x Brampton's population, which means that its high(ish) density multi-family clusters are separated by oceans of sprawl.
Brampton:
(map comes from a different website, this is the closest I could get the colours to be, the breaks between each density category are the same though).