That's a relief.
43707 Mazda Amemiya Aspara Drink RX7 JGTC 2004.http://www.ebbro.co.jp/item_gt_04.html
Externally the SUPER GT 2005 version sports subtle differences.
Like the front hood, and rear wheel fairing/bodywork.
Other than that it appears there's differences in sponsor decals, and placement.
Very subtle, that's for sure.
A good trivia question for Ebbro, and Mazdaspeed fans.