I've just noticed the 30% off for REI. That along with the comments will close the deal for me. Thank you!
I refuse to buy from REI because they support land closure organizations like The Sierra Club. Instead, I buy from Cabela's or Bass Pro Shops or The Sportsman's Guide or any of a number of other companies that support keeping public lands open for all of the public.
The Kingdom 6 is perfect for our family of 4. If you compare it to the Base Camp 6 on there website the difference in the dimensions are a matter of inches. The Kingdom 6 has the divider wall feature to separate the tent into two rooms. The Base Camp 6 has the mountaineering-style geodesic pole design which would hold up better in some weather the Kingdom 6 probably wouldn't. The best thing about purchasing either is the 100% satisfaction guarantee.
Dana Designs Nuk Tuk
This is very true, but I think it doesn't really define the gap between the tents. The Kingdom tent is much taller, allowing you to stand in it, but its really more like the tent you'd set up in the backyard during the summer, or maybe at the beach. It's not an all weather tent by any means. The Base Camp will hold up to snow, torrential rain, hail, and 75mph winds. I know from personal experience!