📄️ KiCad Schematic
If you are evaluating code-based schematic tools, you almost certainly already use KiCad. It is the default for open-source hardware, and its schematic editor is mature, well-supported, and free. Both the KiCad schematic editor and Circuitscript produce what pcbnew needs for layout, so the only step in question is schematic authoring, and the useful comparison is narrow: a mature GUI with deep libraries, or a plain-text source that reads cleanly in a pull request. Whether that swap is worth it depends on what you need from that one step.
📄️ SKiDL
If you are evaluating code-based schematic tools, you have probably already found SKiDL. It is the closest thing to Circuitscript in terms of scope: both tools let you describe a circuit in code and export a KiCad netlist, and neither does PCB layout itself. Both are MIT-licensed and run fully local. The differences are in approach, and whether they matter depends on what you need from the tool.