One very noticable difference coming from a Titanium is the sensitivity of the steering. The Titanium was very responsive, but this car is responsive x10. The slightest movement of the wheel at interstate speeds will have you changing lanes before you realize it. It also has more 'tramlining' tendencies, which isn't a problem...but it'll get your attention quickly.
Everything about the car feels more alive. I thought the Titanium was pretty responsive, but this car makes it look like a slug.