The old, awesome Chicago, Burlington, & Quincy's Zephyr, and her beautiful art-deco styled E unit lead passengers past one of the old Burlington Northern's Executive Train F units underneath an overcast prairie sky. Illinois Railway Museum in Union IL 7-22-12
The Burlington's nose has far more of a rake, the BN unit looks awful close to 90*. I think that may have been part of the E's styling as part of the Zephyr consist. Personally, i like both sleek, aerodynamic look of the Zephyr and the more utilitarian, almost blunt F equally!
Now most roads don't even want to wash or properly maintain their equipment! Union Pacific spent a small fortune laying the groundwork for a series of wash racks and promised they were going to give each unit a thorough bath at every opportunity, but all work stopped after the foundations, plumbing, and all that were installed. And i've yet to see one clean unit in regular service!