As the others have said, they are both great! It is mostly a trade off of extra bulk for greater warmth for the bowman jacket. I only use my bowman jacket when the temp drops below zero, but for me the bushman is only good down to around 20 without excessive layering. The trapper fills the void real nice. In fact, my trapper before I out grew it.... (I mean before it shrunk... Yea, that’s it, it shrunk…That terminology makes me feel better already), and my KOM vest was good down to -10. These temps are for tree stand hunting, when walking, stalking, or climbing, there has only been one time when hunting in Montana when I needed the jacket while out of the tree stand. As Erik said, it will shrink 3-5% over time, and you may want to allow for a 5-10% growth spurt, especially if marriage is in the future.
However, after all the praise I just gave KOM, I now use Hidden/Gray Wolf for most of my cold weather hunting; the weave of the wool is tighter and it blocks the wind better without a liner. In my opinion, both of the patterns, predator and Blowdown, are excellent with Blowdown getting the edge.