When I finally get my shareroller, my NWT won't roll folded but it will only be 30.3 pounds total weight. And I can remove the shareroller in 10 seconds and pop it in my backpack so I'm left again with a 25 pound bike.
They make a special mount for the Brompton - there's a pretty cool video of the SR/Brompton combo. If folding AND rolling mattered to me, that would be the ideal direction I think. With the advantage over the Brompton electric version in that it can be moved from one bike to another using multiple mounts and you don't have the added hub weight when riding manually.