I received an elongated seat and a round seat, and I like them both.
I prefer the elongated one because I like the fan/air freshener component with it and it was actually easier to install than the round one.
They look so easy to clean, are comfortable and of course I love the blue light and the soft closure of the seat and the lid.  Leave it to Kohler
to make a quality product.  Truly just love them.  I'd never removed or
installed a toilet seat in my life so felt so pleased to be able to remove
and install two different types.   Definitely learned a new skill.   Now I 
can help my friends/relatives to do this too.   Amazing how it improves
one's life with such a small but important change.