Budweiser Budvar is the original recipe Budweiser. It got its name from the town it originated in, Cesky Budejovice (known as Budweis under Germanic language of the Austro Hungarian Empire days). The Germans adjusted the recipe, called it Budweiser....
Anyway, you might also want to try a couple of varieties of Staropramen as well as Vyskovke Pivovar if its available in Prague. I was out in Vyskov yesterday where its made and its quite good. Vyskov is about 30 minutes north east of Brno by the way.