Hi, it is really difficult to say, in fact the large breveries was bought by multinational corporations which then all produces the same beer
But I think the top Pilsner is still the Pilsner from Pilsen (Plzeň).
Pilsner (also pilsener or simply pils) is a type of pale lager. It takes its name from the city of Pilsen (Plzeň), Bohemia, in the Czech Republic, where it was developed in the 19th century and where the original Pilsner Urquell beer is produced today.
(source: wikipedia.org)
So the answer is easy:
http://en.wikipedia.org/wiki/Pilsner_Urquell ... I think it is exported to Canada, so you should compare your beer with Pilsener Urquell. I am not the right beer drinker, but yes, Pilsener Urquell is really great beer (I hope, it becomes not less while exporting such a distance ... in fact the best way is to buy a ticket to Prague and move to Pilsen and test it by yourself
You should test this:
http://en.wikipedia.org/wiki/Budweiser_Budvar too. (But not sure if you can get it becuase there is still some legal dispute (I think, it was not solved yet

) between Czech Rep. (owner of
http://en.wikipedia.org/wiki/Budweiser_Budvar) and Anheuser-Bush (
http://en.wikipedia.org/wiki/Anheuser-Busch)
Not sure if Budweiser Budvar (produced in Budweis - České Budějovice) uses the same technology as Pilsner Urquell but I think, most of Czech beers are made by the same technology - as lager produced by bottom fermentation.
Jan