Almost the same place today. A large red bus on the "Google Earth" prevented me from getting a better comparison. However, you can judge by looking at the Greek style columns high on the right of the buildings. The older picture does demonstrate just how dirty the buildins were but my quirky view is they looked better then. Perhaps the older view is just so much more dynamic and impressive.
Roughly the same time had elapsed between Grainger completing his buildings and the dirt accumulating and the cleaning in the 1970s and today. No wonder we are living longer.