While I'm glad to have the latest STi, I sure wish it had been Tamiya not Fujimi.
What's good vs. the Tamiya kit? It's a new STi. Steerable wheels, separate exhaust.
What's not so good? Rims are too small and incorrect. Interior is from the '90's STi coupe, with cheesy blocks you must glue to the sides, and you must cut the package shelf and glue another on. Body isn't nearly as crisp as Tamiya's. Weird molding over side glass, almost like vent shades/extra large rain gutters. Trunk lid completely wrong, doesn't have the center dip/raised edges that sweep back from the taillamps. Grille not molded open. Costs more than a Tamiya.
Pics:
Rims (Tamiya on left, Fujimi on right)

Note the completely flat, completely wrong trunklid...

Notice the rain gutter detail...

The front looks decent, though the grille isn't molded open.
Fujimi, you really need to try just a bit harder...