But isn't the 675LT in a more higher price range, like 100k more than a H ? Even the 650S is somehow glued to the road, really a high tech car. Looks is not that great but very functional. If you only look for ultimate engineering and don't bother the more or less unconfortable entry then your fine. I sat in the 650S and felt nothing special (I did not drive the car), I sat the first time in the H and it felt like the car was made for me. I had room to move, seats were perfect (not the carbon ones I tried in another car), just perfect.

Now the SL may have carbon seats as standards as well as full carbon insides the doors. Probably also a more track-oriented suspension, mabye no magneto nor lifting as these stuff adds weight. Nothing comfortable but an SL never was.