If you're a power user who loves to multitask and stay on top of things, Nougat is likely the way to go. With its advanced features and capabilities, you'll be able to get more done in less time. On the other hand, if you're a casual user who just wants a simple, easy-to-use interface, Marshmallow might be the better fit.
Android 6.0.1 Marshmallow vs Android 7.0 Nougat-What has changed? - YouTube
For gamers, Nougat offers a more immersive experience with its support for VR technology and enhanced graphics. Marshmallow, while still a great option, might not provide the same level of graphical fidelity. Ultimately, it depends on your specific gaming needs and preferences.