???

[Super]

I had no idea there were different colour variations of these trucks either. The dark grey ones look more similar in colour to normal Plarail train wheels or the bodies of the Troublesome Trucks. These coal hoppers appear to be the "special" ones that have loads that flip when they touch specific TrackMaster track parts. I actually got two HiT Toys ones in this coal loader set (they were not metallic as depicted on the box):

Thanks for the information. Because of it I was able to do a little checking. I believe the set you referred to is the one with two dark grey hopper cars with the orange tipple. There also was a different set with one hopper car and an green tipple that looks to be light grey and another set with orange tipple that has one light grey car.

Unfortunately for me the two coal hopper cars that arrived in the mail today are both light grey which leaves me with 4 light grey and 3 dark grey. Really need the dark grey and will be looking for more of those. As most of you know our large layout is 99% light grey tracks and 100% light grey risers and the light grey vehicles just blend in too much with with all the grey already there. At least the darker grey will give a little more contrast.