OK, I'll give it a shot...

Styles are often very generic and can be used for many different, yet similar songs. This can give one the ability to "fake" an arrangement with a minimal amount of work. A simple chord and lyric sheet can be the start of a very complex and intricate arrangement created on the fly.

Sequences allow the performer to use both hands to creates extra excitement to a recognizable arrangement. Adding a bit of one's own creative self to an already popular song arrangement can make an entirely new product out of a tried and ture rendition.

MP3 files, like sequences, allow for 2 hands to be free to accent the arrangemnt of a song. MP3 recordings also add the flexibility to pre-record additional parts that may be unavailable on stage....eg: live, harmonies from real singers, guitar solos, etc.

*** This is the kind of info that I feel many people would love from the collective experience of our members. Go for it !