BP and Shell are defined by differences

…BP and Shell look increasingly defined by their differences, rather than how they could complement each other. Shell, which reports its third-quarter results this morning, is investing ever more in the kind of unconventional energy assets such as oilsands in Canada and elephantine engineering projects such as Sakhalin-2 that BP has been shunning. Lord Browne is making a point of spurning the oilsands opportunity, demonstrating BP

And it is true that BP and Shell are