CN Rail vs. CP Rail

This chart or post is not a value judgement on the respective companies, but it looks like that somebody playing the two-stock Canadian railroad industry should be shorting CN and longing CP:

CP Rail’s market cap at present is about CAD$10.1 billion, while CN Rail is at CAD$33.6 billion. In terms of profitability metrics, for the year ended 2010, CP had $651 million income, while CN had $2.1 billion income. Strictly in terms of backward looking P/E, they both scale equivalently which could justify the upper end of the price differential seen by both companies historically.