Sure will try. As background I consider myself a roadie but urban spaces mean I’ve had experience with lots of folders.

I had a Bike Friday Companion. Rode better than any other previous folder of mine (and I guess by that I mean that it approximated my road bike geometry best). If I rode smooth tarmac, it was fine. But it didn’t take much to make me aware that I wasn’t on my road bike – uneven sidewalks, dirt paths in a park, small potholes or speedbumps, a loaded rear rack, going uphill – all impacted the ride. Mostly showing that the relatively unweighted front - with that giraffe of a stem riser - combined with a small wheel to be twitchy. I don’t get those sensations with the Helix. It is probably pilot error, but I never figured out how to ride hands-free on the Bike Friday (or any other folder). I can on the Helix.

The other thing is probably more aesthetic but the Bike Friday doesn’t have the most elegant ‘fold’. Rather it kinda scrunches down into a pile. While the Brompton and the Helix fold neatly like origami. And I can push either around when folded so convenience/utilitarian points. Not any of the above is scientific, so take it with a grain of salt. To me, the Bike Friday is a folding bike that approximates standard riding experience. The Helix is a standard bike that happens to fold (and fold really well).