I would (and did) start over and audition all the styles on the Audya. Many of the SD styles are there too, and they have already been customized for the Audya.
Be sure and explore ALL style categories, because many styles seem to be in the "wrong" categories.
It's easy enough to add your old styles. You can try them directly from a USB drive. If you save them to a registration, then the USB drive is no longer necessary, as the registration remembers the style.
My advice: keep an open mind to using the new styles; don't try to merely duplicate what you already have.
Hope this helps.
DonM
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DonM