Amuse S2000 definately. Tuned correctly, it owns the 111R.
Then you haven't driven a good 111r driver, I know I haven't ever found another one.
Plus, the Amuse has way more horsepower, accelerates almost as quickly as the 111R, and has a much higher top speed. The handling is nice too.
The 111r only keeps up with the amuse if you aren't using weight at 85%, I believe I ran it at 98%/323hp before I could keep from getting run down by them, but then you give up a lot of agility. The 111r is definitly not the fastest car for suzuka (my fastest time was a 2'01), however it has a ton of advantages
online that the s2k/gt lm/z06 don't have.
-through the essess you can steal a position the instant somebody slips up in the slightest. Because you're riding their bumper at 10-15mph slower than you can go, as soon as they mess up just the slightest you can mash the gas and squeeze through the opening.
-because your top speed is slower and you handle better, your brake points are way past everybody elses. So even if they manage to start to squeeze past you, they will brake before you and now you're back in front again. (very useful at the 130r)
-people pass you on the straights, because you're slower. So there's no need to block or for them to ram you.
-you're faster in the corners, so people aren't pushing you out of their way.
-you brake later than them, so people aren't running into the back of you to stop.
So while the car will definitly lose in time trails, online it is very capable of P1.