Harvest Moon GBA

Hey guys/gals! I know that these forums are mainly pro PC, but I have to ask... There's a new Harvest Moon game coming out for the GBA called "Friends of Mineral Town". I need somebody to clarify for me if it has the same exact story line as Harvest Moon "Back to Nature" for the Playstation one. I know for a fact that the different ways to find/unlock the secret items are different for both versions. Also, there are few more events/items. I'm mainly wondering if there's a difference in story line. If it follows the same exact story as the PSone version, then I may have to rethink my purchase.

Thx in advance!!!:D