I used to fly the G14 almost exclusively. It can turn slightly better and for about 1000 feet range, between 4-5k, it can out climb a k4. The k4 is more 'stable' to me, but the G14 is more 'squirrelly' in its handling. As sunsfan stated, the g14 has less torque. The handling difference between a K4 and G14 don't seem that extreme to me, unlike the difference between a K4 and a F4. Both planes can do some 'tricks' which you may find fun to pull on a red guy. Tricks that exploit their handling characteristics.