Canadian pipeline rivals Enbridge and TransCanada are earmarking billions for new pipelines to capture a larger slice of North America’s crude oil market. Some investors say Enbridge is the better bet.

Headquartered on the same downtown Calgary street, the two companies plan to spend a combined $68 billion through 2018 on projects including pipelines and power generation. Enbridge, already Canada’s largest transporter of crude, stands to profit more from increased demand as TransCanada struggles to win U.S. approval for the Keystone XL project.