Canola is different from rapeseed

In the early 1970s, canola was developed using traditional plant breeding techniques to significantly reduce the levels of erucic acid and glucosinolates that were found in the parent rapeseed plant. The name "Canola" is a contraction of "Canadian" and "ola", which means oil.

There is a strict internationally regulated definition of canola that differentiates it from rapeseed, based upon it having less than two percent erucic acid and less than 30 micromoles of glucosinolates. Oilseed products that do not meet this standard cannot use the term canola. High erucic acid rapeseed acreage, although still grown, is now confined to production under contract for specific industrial uses, including environmentally friendly lubricants.

Canola oil has generated a lot of research interest into its potential health benefits because of its low level of saturated fat, high monounsaturated fat and good balance of omega 3 and 6 fats. Click here for a directory of canola oil-related nutrition research.
and from canola council: CanolaInfo | What is Canola Oil?