I have both and the differences are hard to detect. I do think the Jetstream jacket is the best early/mid hunting jacket on the market. It does an excellent job blocking the wind and fits better (tighter), than the Stratus and is equally as warm. I throw a merino base, Fanatic hoody and light puffy jacket underneath and sit out at 40 with no problems. I can push it to 35, if needed, for 2-3 hour sits. It also has a bit more flex than the stratus; it is a great option for saddle hunting.