Ive never actually compared a 1uz soarer to a 2jz-ge soarer fuel usage wise, but the 2j's seem to be fairly thirsty (I've owned a few now....)
They're not terrible, but they're not really an economy option
I know this isn't the first time we've had this convesation, and I'm still not 100% sure what exactly it is that you want exactly, but have you looked at that single turbo auto soarer in tauranga, which is on trademe for $7550? I don't know what the car is like, but if has been done properly it''ll be an awesome car - if its got even close to the 250rwkw hes claiming (quite realistic) then it'd make an NA soarer feel like its going backwards!
And probably still be quite civilised and fuel efficient when you're just cruising.