UT3 is more AAA engine , even if unity has some good power and have been choosed for the next Funcom mmo !

It exists a plugin to convert animated blender characters from Blender to UT3 , i'll have to dig it !

But Unity have great things like fully ready to go camera system like "spring follow" and others , that you can tweak if you want on the panel properties.
It's has basic things like also basic physics where you don't have to code anything, just choose the good thing, tweak in property panels , and it just works perfectly !

Yeah , why coding each time camera system, or basic physic collisions (and constraints if you have), and lot of other stuff ?