Since they are based on web apps that are used everyday, this real world scenario allows the benchmark's numbers to be better. Google claims that "a high score in the new benchmarks directly translates to better and smoother performance in similar web applications" since it is based off of real applications.
Google has provided us with an overview of the tests:
- GB Emulator is derived from an open source emulator of a famous game console running a 3D demo.
Furthermore, Google has updated the interface of the V8 benchmark suite, which Octane is derived from, to better show information and to automatically adapt to different sized screens, whether they be on a smartphone, tablet, or desktop computer. Google has also released the code the for the open-source benchmark and it is available on Google Code's website.