Covered hopper cars from successsor and predessescor railroad. Hawthorne Junction. Chicago Illinois USA. March 2007.

I spotted an interesting comparison firsthand, on this southbound BNSF unit grain train. I took this photo after work one evening in March of 2007. Seen here moving slowly, is a southbound BNSF Railway unit grain train traveling over the Belt Railway of Chicago tracks at Hawthorne junction.
In the year of 1995 , the Burlington Northern Railroad, and the Atchinson, Topeka & Santa Fe had merged and became todays BNSF Railway.
The car to the left is in the current BNSF color scheme and markings, while the car to the right, is still wearing the 1970's era Cascade Green with a large BN logo.