Mike, Jim, & Lynn,
With the standard 4.5 oz fill in the Skaha, the warmth comparison to the current Minimus version should be about the same when tested in a lab. Overfill in the Skaha is a completely different analysis. Hoods are options for both garments.
The standard Skaha will LOOK warmer because of its box construction but will test about the same on a thermal tester (no wind, lab environment). I base this statement on the large number of jackets I thermal tested last year. This range of products included both stitch-through and baffled construction. For the same fill amount, the difference in the insulation measurement was in the normal 5% error tolerance for being equal. At least in the range up to 6 ounces of fill, box versus stitch-thru construction averaged only about a 2.8% difference in the Iclo values. This is primarily attributable to the 2.8% surface area of the stitch through channels. In the range of the typical fill rates for down jackets, as you increase the down density (stitch-through), the conduction losses go up and the radiation losses go down to create a wash.
All of the red values in my table were calculated by me. I am well aware that they don't publish the fill amounts and this is an irritant to some. Neither Patagonia nor the North Face publishes their fill weights also. I reverse engineered the PHD Minimus specifications by analyzing their published fabric and garment weights to ascertain the down weight. I also reverse engineered their published Comfort temperature and activity description to ascertain the down weight. Both reverse-engineering-techniques yielded the same approximate value of 4.6 oz.
If either of you want to discuss PHD products further, lets start another thread because this thread now seams to be drifting off topic.