N1k2is, I believe, the toughest Japanese fighter, but the ki84 ain't bad. As for fighting the ki from the sixteen, I seem to recall that badboy generated an e-m chart between the two and the spit has s lightly better turn performance. Usually, I feel pretty confident against most ki's in the spixteen, but occasionally, a good pilot can pen you from one. Meanwhile, with the 109g-14, I always feel disadvantaged opposite the ki. As for its durability: it's a radial. Also, parts, especially ailerons, seem to come loose at in opportune times. That said, my anecdotal read is that it's pretty robust.