This is Dahon's version of the Brompton and Dahon somehow managed to give it a "Hunchback of Notre Dame" look to it.
Several have commented on the 'unnatural' frame curve.
I wonder if the Curl has a rear shock.
The Curl does not have a rear spring. It is a hardtail. The way Andrew Ritchie design the Brompton rear suspension, the spring is compressed with each pedal stroke. I've noticed that over the last ~15 years the Brompton factory & Brompton riders have moved to progressively stiffer and stiffer springs to mitigate rear squat.
Apparently the Curl has jettisoned the front luggage block to get a narrower fold.
Many Dahons have a carrier block. The caliper brake Curl would have been problematic to fit a carrier block solely because of the design decisions Dahon made with the front brake.
I've posted several times how I safely and stably carry front loads on my Curl, but the presence of a carrier block is a near-religious item for many riders. Now with the disc brake version of the Curl, there's no discernable reason for the design not to incorporate a carrier block. Customers want what they want; why don't you give it to them, Dahon?
Fun fact: The Dahon Curl broke cover back in 2008 (with, quite frankly, originally a more innovative design) and has been available retail in markets around the globe for six years now.
I like my Curl quite a lot, but presently, with Dahon focusing its distribution, sales and marketing efforts in the Yuxi Circle, it's hard to recommend one to riders in Europe or North America.