of course tifa is going to look different - advances in graphic technology have allowed square enix to adapt their characters to appear more lifelike and believable. I think that cloud is the only one that has remained with a fairly flamboyant hairstyle due to popular demand of final fantasy spiked hair. Whilst this is good in the case of most characters (especially your thoughts on tifa) I personally feel that they have changed the appearance of sephiroth too much. If you've seen the clip of him in the fire I hope you'll agree that without his cool hair quiff he just doesn't look the same!!!!