Comparison (ignore the retrofit in the USDM unit):
USDM:
EDM:
Note that there's no seperate section for the parking light. The parking light/city light is integrated in the main mirror (the holder is inserted, and with a twist it snaps in place).
Which leaves a bigger surface for the back mirror (or whatever it's called). Which means a better output. Apparently, the beam-pattern is better as well.