[Edit] And here is the answer [2]
> PyTorch Mobile uses TorchScript to allow PyTorch models to run on devices with limited resources. ExecuTorch has a significantly smaller memory size and a dynamic memory footprint resulting in superior performance and portability compared to PyTorch Mobile. Also, ExecuTorch does not rely on TorchScript, and instead leverages PyTorch 2 compiler and export functionality for on-device execution of PyTorch models.
[1] https://pytorch.org/mobile/home/ [2] https://pytorch.org/executorch/stable/intro-overview.html#ho...