Budget Friendly Belay Jackets

Looking to buy a belay parka, for a planned Mt. Washington trip next winter. Trying to buy budget friendly/second hand options when I can and when makes sense. For this I’d prefer to buy new. Through discounts and pro deals, I’ve found two seemingly good options but I’m not sure how to choose between the two:

Marmot Warmcube West Rib

Or

OR Super Alpine Down Parka

Both have the same fill power, Pertex Quantum shell, and would land in a similar price point for me. I don’t have the opportunity to try either on in store, but could return/exchange for sizing, so that I’m not too worried about.

Anyone have experience with either? I’m interested in the Warm Cube inner of the Marmot jacket.