It appears that the Canadians and British used different types of stormboats. Here is a link to an article by Terry Copp.
http://www.legionmagazine.ca/feature...9.asp?id=print
"The 20th and 23rd field companies had been attached to 43 Wessex Div. in an attempt to bolster the division’s river crossing capacity. The Canadians were equipped with stormboats powered by Evinrude motors. Each boat could carry 36 men. The British made do with smaller assault boats that had to be paddled."