If you've had a favourite character in the past, then the alterations will be pretty easy to notice. It's more of an overhaul than Soul Calibur III was over its predecessor, and it does genuinely feel new and fresh. And the stunning visuals don't hurt either. Soul Calibur IV is absolutely gorgeous.
The animation has always been superb, but now the detail and solidity of the character models match it. Mitsurugi's scars, Vader's shiny armour, Taki's… assets, they've all been crafted with such care and attention, each pixel has been given some sort of flair or purpose. On a decent 720p TV Soul Calibur IV is one of the best looking games on the PS3, and for once better looking than the 360 version, and is the ideal thing to put on when a mate pops round.