>>1851649Swytch has a cadence sensor, which gives you far less control over your speed.
In terms of lifting, with the Brompton you generally want to hold the battery bag in your other hand if you're lifting. Not sure how easy that would be on the Swytch, or if you're forced to just carry the whole thing together. Two-handed carrying an unfolded bicycle is one thing, but folded.. is quite a lot harder due to its shape.
Can't argue about the plane travel. Brompton really needs to come up with a smaller battery.