When comparing wren vs GDScript, the Slant community recommends wren for most people. In the question“What are the best scripting languages for game development?” wren is ranked 7th while GDScript is ranked 10th. The most important reason people chose wren is:
There are lots of scripting languages out there, but many have unusual or non-existent object models. Wren places classes front and center.
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Pros
Pro Class-based
There are lots of scripting languages out there, but many have unusual or non-existent object models. Wren places classes front and center.
Pro Easy to learn
Pro Tiny runtime
Pro Similar to Python
Simple to learn and easy to read.
Cons
Con The ecosystem around it is small
This language hasn't been around long so there isn't much ecosystem surrounding it, including community discussions online.
Con Godot only
GDScript is specifically designed for the scene tree design of Godot, therefore implementing it for different engines with varying architectures might be hard.