I have ran "ALL" of Kales Predator antennas...everything from the original single coil, to the dual-coil, bad to the bone, comp, 30K, and different shaft lengths from the 6" to the 27"....and in my humble opinion which together with a couple of bucks will buy you a cup of coffee..."You can't beat the original single-coil Predator 10K..."
"Hight is Might" ...more turns in the coil means shorter antenna...
I have a Monkey Made "Big John", a 55, a Lightning Golden Rod, and at least a dozen Predators, but what is on my truck is the Single Coil Predator 10K...
Haven't tried his newest contraption, the "Little Sweetie"...have herd it is the best of the bunch, which "may-be" true since the thing tunes taller than any of the other 10K's. It has tighter wound turns in the coils, and from what I was told, it causes the antenna to tune almost a foot taller than the original single-coil 10K....
Kales a good friend of mine for the last 20-25 years, and he keeps me in good supply of antennas to try out.