There are 3 different coaches. One has the Grizzly flats logo, one has no writing and there is the Christmas version with icicles.
Many different chloe engines have been made, original with belt drive and plastic rear wheels, first Xmas with belt drive rear plastic wheels, Marklin with drive shaft and metal rear wheels (motor needs power leads soldered) , and now the latest I believe is back to belt drive and metal wheels. There may be others but these are the ones I have worked on and seen the inner workings.