Either brand is a equally good motorcycle.
You will get a different answer from almost anyone you ask. The answer will be based more on brand loyalty than anything else.
If Kawasaki were really superior to Honda, Yamaha, or Suzuki, this would be the only make of motorcycle they anyone would buy. Honda, Yamaha, and Suzuki would be forced to stop making motorcycles that they could not sell. Last time I looked, Honda, Yamaha, and Suzuki was still selling lots of motorcycles.
If Honda were really superior to Kawasaki, Yamaha, or Suzuki, this would be the only make of motorcycle they anyone would buy. Kawasaki, Yamaha, and Suzuki would be forced to stop making motorcycles that they could not sell. Last time I looked, Kawasaki, Yamaha, and Suzuki was still selling lots of motorcycles.
If Yamaha were really superior to Honda, Kawasaki, or Suzuki, this would be the only make of motorcycle they anyone would buy. Honda, Kawasaki, and Suzuki would be forced to stop making motorcycles that they could not sell. Last time I looked, Honda, Kawasaki, and Suzuki was still selling lots of motorcycles.
If Suzuki were really superior to Honda, Yamaha, or Kawasaki, this would be the only make of motorcycle they anyone would buy. Honda, Yamaha, and Kawasaki would be forced to stop making motorcycles that they could not sell. Last time I looked, Honda, Yamaha, and Kawasaki was still selling lots of motorcycles.
They are all decent motorcycle manufacturers. I suggest looking at all 4 brands if you want a Japanese motorcycle. Go to each dealer. Take some test rides. Then decide on which one you like best.