bj11111, I know, right? SOOOO AWESOME!
I suspect that the Levi's one will be better than the COS one for you. I've seen both. Levi's is a better length.
My client sized up, and I stayed TTS. It's boxy in front, and round and billiowing at the back. I sized up two sizes and liked that too! However, I JUST bought a very bespoke acid wash Yorkie denim jacket that is oversized, so didn't want another.
Maybe size up ONE size so that the sleeves don't drown you.