Hi Rikki,

One thing I have noticed and I am sure many others would have as well is that even though styles are duplicated or reworked across the generations, they may appear to sound exactly the same on the surface but a lot of them do have some subtle changes such as different intros and fill in's which can make a difference. For example whilst I was going through the SX900 styles, the style StadiumRock has a different fill in to the on the T4 which I don't prefer, so if when I use this style I will select the T4 version from the USB. I suppose you'll only know the difference from styles you use a lot. I know there's a few out there that have changed so it's always worth having every version you can get hold of.