the 2010 mustang comes with some changes everywehere. New exterior [parsonally I love front of it and hate back lamps design], wheels, glass roof and a chrome pony badge. I must say, interior is much better looking and makes you feel good after spending 21 to 52 k $.
From technical side some sync is awaylable [as Ford themselves say: for Vehicle Health Reporting], voice-activated navigation, dual climatronic, satellite radio, capless fuel filler system, heated seats, reverse camera system and AdvanceTrac® electronic stability control, handling upgades, cold-air induction system, axle upgrades, etc.
4.6 V8 with 315 HP
4.0 V8 with 210 HP
and 5.4- 32-valve V8 with 540 HP