Can't comment on the tech pack, other than the screen is better, but the SD nav is ****. Don't get me wrong, the integration is good, but the actual sat nav is useless.
I've played about with all the settings but can't get it to pick up a realistic route comparable with TomTom, Google maps or Here Maps. Getting it to use anything other than motorway or main trunk routes is a challenge. Last week it picked up 'slow moving traffic for 1 mile' from the traffic data stream and tried to send me on a 43 mile diversion. There is one of about half a mile through a local village! Worst £450 I have ever spent