Westjet business class - on the 787 only is comparable with Air Canada and the pricing is comparable too. At the moment it operates to Toronto and Calgary but with the start of the summer season the operation is more extensive including Vancouver.
If the fare is better than Air Canada and the timings suit you, try it but there's not much to choose between them - though Westjet crews do seem a bit more enthusiastic compared to their cousins at AC but that's not difficult!