Eurorack Modular Synth 3.5mm Super-Thin Patch Cable Comparison - Tendrils & Ctrl-Mod
TL;DR: both Tendrils and Ctrl-Mod 3.5mm eurorack patch cables are amazingly thin, durable, and highly functional. Make your decision based on whether you need straight or right-angled, and how you feel about the aesthetic differences.
Update 2022/08/01: article updated to note that Ctrl-Mod also has 3.