The biggest thing you want is getting a Nvidia GPU. There are a number of features that are exclusive to Nvidia GPUs and generally their performance is best. This is one of the issues with macOS since Apple and Nvidia haven’t played together in over 6 years.
There are also a number of Windows-only SDKs, such as Kinect/RealSense/ZED cameras, Notch TOP, and the Oculus and Vive VR support to name a few.
If you are interested in which features are limited on some systems, you can refer to our system requirements page: System Requirements - Derivative
For actual benchmarks for laptops, you can think of TouchDesigner as a video game engine, it’s realtime and requires much the same for specifications. So looking up laptop’s gaming benchmarks will give you the best idea of how they compare for TouchDesigner as well.