One would think that a jacket filled with down would be warmer than anything filled with who knows what. Unless said jacket is really damn heavy and shit, which I think that bomber doesn't look like it.
the heritage bomber is real thick and at least as heavy as this years down. can't imagine it being more than slightly less warm in freezing weather if even. and i'll def be wearing it in rain/snow over the down so i don't walk around with 20 pounds of wet wool. down gets more compliments though