I got both of them built.
I find Fujimi interior is alot more easy to do than Tamiya, but is just my

. I hate to lay those carpet on the model. Tamiya interior floor is not flat, but holes every where. You need to lay the floor carpet that Tamiya provide on it. As for Fujimi, they didn't give any floor carpet and interior floor is flat as usual.
But if you love to do with carpet laying, go for Tamiya. Both are the same wheel suspension just like 350Z.
Rtuned