The simplistic 'left-right' spectrum isn't particularly useful when it comes to something as complex and location-specific as politics, left-right is really just vibes in the end. You're on the right path by comparing policies, and it helps to understand the different contexts they're in (e.g. US red scare culture), along with the similarities you mentioned.
I think this exercise could be fun and deepen you/our understanding of politics, but at the end of the day, different cities have different material conditions (circumstances) which means the same policy may make sense in one environment but not the other. I think an insightful exercise would be to compare the DSA to your country's main demsoc parties (PvdA/GL?) and figure out the main differences and why they're different.