As far as Im aware - interior options for the F-Sport are Black, Red and *white*(this one may not come to the UK though)
Of course, on other models you can choose a new shade of grey called Moonstone, Brown, Beige and Black :)
The RX450H has always had a spare wheel in the boot - mine does anyway.
I dont think there are any massive changes to the suspension but its basically an evolution - ie you get adaptive dampers now and F-Sport gets the active stabilizer for flat cornering.
If you take a good look at the spec sheet (Japanese anyone?) its being compared to an X5 Xdrive 35d!
Appears there is now a sunglasses holder. Cupholder from the drivers side has been removed and replaced with buttons and a small storage area. There is a picture referring to the glovebox and armrest cubby - are they cooled perhaps?!