Stock 1UZ and stock 2JZGTE? Everyone already knows the answer. The 1UZ is a slug in its stock form, while the 2JZGTE is already a mild monster. 2JZGE is even worse than 1UZ.
I've seen on video clips that real drag cars with 1UZ that run around 6 seconds. I'll try to find some clips, but too lazy for now. I can't say which engine can top the power because the drag slip is all the proof. Once you build 1000 hp+ engine, the available parts and costs aren't the concern anymore. Many machine shops out there have been building custom parts for drag cars for so long and they can make anything you want. I like the 2JZGTE, but I already fell in love with the V8.
Anyway, talking about drag cars seem to be off track of this topic. For low to mild power for street with the same hp, the boosted 1UZ is more fun to drive from low to top end. You can look at all the dyno of the 1UZ, the tq and hp jump straight up right away, while the 2JZGTE hp jumps straight up a little later and the tq is even after that with less tq.
After the mild power cut off point, let's say 500 bhp, then yes, the 2JZGTE has more advantage than the boosted 1UZ because it doesn't require much to make more power reliably. The 1UZ now faces critical condition.