I've been rereading Daniel's Three Doors MCTB Chapter and Shinzen's 10 Steps Towards Enlightenment:
http://www.dharmaoverground.org/web/guest/discussion/-/message_boards/message/5080083 . Daniel says that at Fruition there's (only) two Characteristics at play, one at the foreground the other at the background. And so, there are 6 different ways that Fruition may display. Shinzen seems to imply a specific two-stage paths, Impermanence & Dukkha and No-Self & Impermanence.
It's more of a linear-sequential model, where in Steps 1-6 it's all about Impermanence. As its focus is in noting vanishings, it seems to by-pass the Dukka Ñanas, or at least lessen them a lot. Then at Step 7, at first it looks like he's talking about Equanimity (dwelling in subtle preconcious experience). He actually says the Nothingness where everything arises from and returns to "becomes rich providing tranquility, safety, fulfillment and love". The thing is that the transition from Step 7 (Passings become rich) to Step 8 (Arisings become rich) is where his famous "Ground Reversal" shift happens. This is actually Stream Entry, entered through Impermanence at the foreground, and Dukkha at the background. Then at Step 9, "all arisings tend to coalesce into a single polarization, all passings tend to coalesce into a single polarization". Here he's talking about a final Fruition, where No-Self is at the foreground and Impermanence at the background.
In some way, Dukkha plays a different role to Theravada-DhO's model, not as a shitty place/phase/stage one has to walk through, but a natural renunciation / immersion into "tranquility, safety, fulfillment and love", a crucial step that let you walk into stream entry. Daniel talks that entering through the Dukka door is the more unsettling, death-like experience. Perhaps Shinzen's Dukkha build-up make a radical different experience.