The Kirin A1 chip is still better.
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The Huawei watch GT2 uses the Kirin A1 chip.
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The Huawei watch GT3 uses
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ARM Cortex-M chip, but the ARM Cortex-M is just an architecture, not a specific chip model,
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I think the Kirin A1 is better. The chip measures 4.3mm x 4.4mm and integrates a Bluetooth processing unit, an audio processing unit, a low-power application processor and a separate power management unit. The Kirin A1 uses BT-UHD Bluetooth codec technology with a maximum transmission bandwidth of 6.5 Mbps. Pretty good