Looking for Shelter

I'm in the market for a tent, mostly for winter use, and going even more specific, mostly for fatbikepacking.
I have a GoLite Shangri-La 3, which is great, but I want an enclosed shelter for winter winds & cold and summer bugs.
I want it to be simple to set up in extreme cold, low volume packed size to fit on a bike, large enough interior for winter down bag & parka, and as light as realistically possible. I've debated just using a tarp, as I'm a keep it simple guy and love pyramid shelters, but go back to the tent idea, because they hold in so much heat and make camping below zero that much more enjoyable (warm, err... comfortable).

I'm looking for advice on which of the following tents I should get.
I like both, because they support themselves in the center and simply need to be pulled tight at the ends.
My question is, would the Moment be ideal year-round and worthy of Alaskan winter use? Or is the Scarp worth the extra weight for winter and suck up the weight gain for a bombproof summer shelter?
I'd probably be using either one in moderately protected areas, not on summit ridgelines, for instance, because you can't bike there and that's mostly what I do in winter, with some off-trail hiking, too. So, I'm not sure if strength plays a huge factor in this decision... maybe not as large as weight or inner tent material, i.e., tent warmth.
I could always use either one in summer with the mesh inner tent, or without it completely, which is more likely. If I used the Moment in winter, I'd probably just use the fly sheet and curved pole, unless I got the clip-in breathable liner, too.

Tarptent Moment or Tarptent Scarp 1?

Thanks for the help!

By the way, I have ruled out the Hilleberg Akto, as it is essentially the same tent, aside from a few minor differences, weighs about the same, but is A LOT more expensive. Plus, I've heard the Scarp is far roomier than the Akto.