1) Western Nebraska generally receives less snow than Eastern Nebraska does.
句末是does. 这用法很普通常见。(有人讨厌does在句末,除非想强调does)
2) Western Nebraska generally receives less snow than does Eastern Nebraska.
这个倒装句把Nastern Nebraska 放句末,与句首名词短语呈对称,美吧,而且依据《句末焦点》原则,句末名词短语更多凸性(简单说印象更深),更好反衬。