That's just not true. If you want a car that is a computer on wheels and will pretty much drive itself, buy the GTR. If you want to look and sound a bit more refined/classy and get a more direct driving experience get the Lexus. Of course a lot of that is supposition but that's the impression I get from the mountain of gumpf surrounding the PR wagon that is the GTR.
You brought up the Lambo thing to confuse things more IMO - because neither car is aimed at that either. If anything the Lotus Evora and the LF-A will compete, along with Merc SL series cars and maybe some BMW M series cars.
Oh, and yes, dynamically and aesthetically the LF-A and GTR are worlds apart.