If you are still with FS9 that version hasn't changed much. Some updates by Robert Baum that were not used by Alphasim have now been included as well as the aircaft textures have been updated. Otherwise its the same package. The price is also incorrect at this time. It was only supposed to be $24 for the FS9 version (same as the original Alphasim price). So it you are interested, wait until the folks at Pilot Shop fix the price.
http://www.fspilotshop.com/product_info.php?manufacturers_id=283&products_id=3809
The FSX version is completely new from the ground (waterline?) up. More info on that verison look here:
http://www.fspilotshop.com/product_info.php?manufacturers_id=283&products_id=3807
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Frank Safranek
Team SDB