I used to joke to Americans that Calgary is the 2/3 mile high city
Calgary seems to have a lot more high-rise residential.
Denver's core is pretty decent at midrise infill, which in Calgary is typically happening in the neighbourhoods outside of the core in like a 4-5 km radius from downtown.
Calgary, from what I recall and witnessed, seems to excel at building smaller scale residential buildings in the 4-6 storey range. And a ton of semi detached infill all over the older parts of the city.
Calgary's LRT CTrain crushes Denver's RTD light rail for ridership. Calgary typically gets ridership of over 300k/day to Denver's ~200k/day.