This week, it’s all about the subtleties of Columbia architecture. Can you tell the differences in the photos below?

Update: Further architectural curiosities abound! A tipster has sent us the photo below, showing a new “little blue bird creature” nestled between a few objects on the ever-growing 114th median sculpture. Curious in that it was added after the fact; curious in that the sculpture there now seems to differ so much from the original design. Maybe this little guy is surfin’ all up and down the UWS: it appears his home is at 72nd Street.

Hi is this my home