Kacbu lists 4 Processors that stand out for Stylus & Notes: Apple, MediaTek, Qualcomm. Each product is here because its editorial assessment found it strong for this use; the order is the Match score, computed from official specs and verified editorial tags, with the reasons under every card.
For pen and note taking the processor's direct share is small; the pen and the screen are the device's own work. Where the processor shows is latency: how the writing feels depends on single-core speed and on waking quickly from idle. Staying awake at low power counts too, because note taking is usually short and frequent.
Each card carries what sets the product apart. Open the product page for its strengths, weaknesses and alternatives.
6 · 6 · SoC (soldered)
8 · 8 · 2.5 GHz
8 · 8 · BGA (SoC)
2.2 GHz · BGA (SoC)