The Fujimi wheels are definitely smaller than the Tamiya ones, though I know there are argument as to which are more "accurate" since the stock 1:1 Imprezas actually have decent clearance.
Having said that, I swapped the Fujimi wheels for a spare set of Tamiyas on my 2005 WRX build.
Nice paint by the way. I think I would build different colours though, especially having the 2005 in Crystal Grey - the colour of my 1:1 2006 Impreza RV. Zero paints do it.
Cheers,
Pots.