Here you go Kresnik:
http://thevitalounge.net/wrc-4-demo-impressions/
It’s easy to see from simply popping in my WRC 3 card into my Vita; things have improved drastically across all areas. While WRC 3 had fairly reasonable graphics for an early Vita release, WRC 4 has had a complete overhaul. Perhaps the most noticeable change which you can see straight away is the detail on the car. In WRC 3 the cars were functional at best, with lo-res textures showing whenever the camera was zoomed in. In comparison, WRC 4′s demo car looks stunning, with improved reflections and much clearer detail. Improvements in lighting also carry over the the environment, with rock faces causing realistic shadow effects that splatter across the track. Another noticeable issue in WRC 3 which arose from the external car view was a choppiness when cornering sharply. This has also disappeared with a solid frame rate throughout.
All sounding very very promising :D