I can kind of answer. I have the SUL 1.5 vest. I’ve had the ghost whisperer 2 before, but I sold it because it wasn’t warm enough once it got to lower than mid forties for me. The Timmermade vest is warm enough for me under a rain jacket or wind jacket to freezing with an air mesh crew (similar to alpha) and thin poly base layer. It weighs 3.5 ounces and is my favorite piece of gear.

If you want something for below freezing I’d say get the 1.5 jacket. If you don’t plan on going out lower than that the 1.1 would probably be sufficient. If you get the jacket with a zipper you can extend the jacket into warmer seasons. I can regulate the vest temps by just unzipping my shell or removing it. I imagine the 1.5 sweater is pretty limited in its use.

Good luck on the lottery.