Years ago, bensyverson said in post #22, the 43 mm screams and the 50 mm just takes a wide view. This exactly is the difference between very wide and super-wide. The latter always tends to add a touch of surrealism to your pictures; the former does not. Below 90° of diagonal angle-of-view it's wide; above, super-wide.
So get the 50 mm if you're into a documentary, reportage, real-world photo-journalist style of work. Get the 43 mm for artistic, expressionist, greater-than-life pictures.