Showing my ignorance here: what’s the difference between “normal” SC and “urban” SC??
About 75 kWh.
"Normal" Superchargers share ~150 kWh dynamically between each A/B pair, which is why you should always try to find an unoccupied A/B pair to connect to (or guess who has been there longest). But if a "normal" Supercharger station gets congested, people can see their charging start in the 30's and slowly rebalance.
Benefit is that if you find an unoccupied A/B pair, you can see charging speeds up to 147.
"Urban" Superchargers expect congestion and heavy usage, so instead Tesla make a hard split of the ~150 kWh, which means all pedestals max out at 72 kWh, but when you plug in you are going to get 72 regardless of how many other cars are charging.