Indeed, one of the difficulties is that there aren't any tools for comparison.
In certain other countries, the voter's photograph appears on the electoral list. However, that is not the case in Canada, and I don't believe it will be soon. There aren't any tools for comparison, particularly since, in view of developments in Canada's demographics—we shouldn't have any illusions—election workers can't claim to know all the voters. So there's no point of comparison. Moreover, the current act does not require proof of identity by photograph.