The top competitors of the Kawasaki Ninja H2 are the Yamaha R1, BMW S1000RR, Honda CBR1000RR, and the Suzuki GSX-R1000. All of these bikes offer great performance and a wide range of features, making them great competitors for the Ninja H2. Additionally, the Ninja H2 offers exclusive features such as the variable compression ratio, which gives it an edge over the other options. Ultimately, each of these bikes offers a unique experience to its rider, and the choice of which to purchase ultimately comes down to personal preference.