the difference between CSX AC6000's on JR

[slenderman8888]

whats the difference between
http://jointedrail.com/product/ge-ac6000-csx-yn2-phase-i/ and http://jointedrail.com/product/ge-ac6000-csx-yn2-phase-ii/
GE AC6000 CSX YN2 phase 1 and GE AC6000 CSX YN2 phase 2?
looking at the preview images they both look the same I bought phase 1

 

[cascaderailroad]

Save both images, enlarge them, click back and forth on the 2 images, you will see the difference