When comparing Kivy vs pyglet, the Slant community recommends pyglet for most people. In the question“What are the best 2D game engines?” pyglet is ranked 43rd while Kivy is ranked 53rd. The most important reason people chose pyglet is:
Since pyglet is so tightly woven with OpenGL it allows the support of drawing in 3D.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Kv design language
Kv design language is designed to work well with scalable graphical user interfaces (GUIs) as one of its primary focuses. It also segregates the logic from the design elements, making them easier to visually distinguish from each other.
Pro Multitouch gestures
Pro 3D support
Since pyglet is so tightly woven with OpenGL it allows the support of drawing in 3D.
Pro Cross-platform
Works with Windows, Linux, and OS X.
Pro Written in pure Python
A small advantage, but being a core Python developer, it may be the best to stick to the roots and develop with pyglet as it is able to compile using other Python interpreters.
Cons
Con Documentation & examples are terrible
Terrible documentation & not too many resources can be found.
Con Very difficult to deploy to various platforms, like Android
Con Small community/popularity
There is a decent amount of documentation and API to go along with pyglet, but in terms of community support there seems to be very little.