not sure which route your google map was taking you to stansted, but mine said from the centre on london by road to LTN AIRPORT 55 mins and STN AIRPORT 1 hour 2mins........7 mins longer
if you go from liverpool st station to LTN its 59 mins and the station is still 6 mins away by bus....liverpool st to STN is 52 mins and the station is under the terminal...hopping distance....even with the biggest bag.
i think that makes us about equal.
apart from all the fog and snow you get in the winter that is.