My RC300h was great to cruise along in but put the transmission into Sport mode and play with the paddle shifters and the car did a very good impression of a sports car, with realistic gear changes, very PlayStation like, much quicker than any other autobox with manual option.
The RX450h is no sports car in any guise but with plenty of power from the 3.5ltr V6 it wafts along very smoothly, I don't feel the need to be 'sporty' It simply covers distance very quickly and effortlessly.