There is a big difference between a Canadian and British accent, but it is very similar to the American accent. Canadian English contains elements of British English and American English in its vocabulary, as well as many distinctive "Canadianisms". In many areas, speech is influenced by French, and there are notable local variations. Canada has very little dialect diversity compared to the United States. The phonetics, phonology, morphology, syntax, and lexicon for most of Canada are similar to that of the Western and Midland regions of the United States. The Canadian Great Lakes region has similarities to that of the Upper Midwest & Great Lakes region and/or Yooper dialect (in particular Michigan which has extensive business ties with Ontario), while the phonological system of western Canadian English is virtually identical to that of the Pacific Northwest of the United States, and the phonetics are similar.As such, Canadian English and American English are sometimes classified together as North American English. Canadian English spelling is largely a blend of British and American conventions. [ Wikipedia]

They sound different.