Do Canadian Prius have the EV button?

Mine does. But that is only because a friend has a friend in Japan who mailed it to Canada and Frank Hudon bailed me out when I was messing up the installation.

The Canadian and US models are very similar, although the options are different and there are some minor differences in standard equipment.

You'll see that the owners manual given to Canadian and American purchasers make reference to both US and Canadian issues such as scheduled maintenance.

None of the cars sold in Canada or US are "US Prius". They are all "Japan Prius" configured for the two markets.

So, for example all the cars sold in Canada come with the rear wiper standard, while this is an option in the US. All the cars sold in Canada come with DRL standard. DRLs are not available in the US and HIDs are not available in Canada. The thermos is in cars in Canada and the US.