yes, I stuck with the Lenovo without looking into the Acer very much. From my experiences I can say that the Lenovo is a great choice and I would take it again any time.
But in the meantime someone else uploaded a build with the acer swift. Maybe that can help you. https://egpu.io/forums/builds/2020-acer-swift-3-sf314-57g-71gl-mx250-10th4ch-gtx-1660s-23gbps-tb3-sapphire-gearbox-windows-10-pro/