Thanks for sharing your photos of the Saitaris. That's a veritable home away from home. Although at 14lb, I wouldn't be taking it without a pulk. At half the weight I have the Kaitum 3. I looked but I don't have any interior shots of it, but here it is in action in late September just below the continental divide in Fox Park, Indian Peaks Wilderness, CO. Altitude was about 11,000ft, and the overnight temps got down to the high teens. Nowhere near the snow you encountered, as you'll see, but worthy of 4 season use.
The Kaitum is the widest of the 3P Hilleberg tents. Three 20" pads fit side-by-side, with perhaps an inch or two in between. The double vestibules and the vertical doors on both ends meant there was no feeling of claustrophobia. As Stephen says, this is fine for three adult males for a short trip in winter, or two adults and a child plus 1-2 dogs in a vestibule for a longer trip.