So...

I'm going on my honeymoon in August and am considering renting a Canon 50mm f/1.0. My question is, does anyone have experience with that lens and the 50mm f/1.2 being sold these days?

While I am considering buying either the 50mm or 85mm L f/1.2's I'm curious if the 50mm f/1.0 would make a noticeable difference when shooting night shots (will be in Paris and Venice)... or does the technological age of it compared to the others render it more of a novelty?