> I also just compared how both browsers displayed HN main page. Slight differences in color of orange and font weight, but only noticeable if comparing both directly (and besides devs, who does that?).

So on the color thing, one of our designers noticed and I looked into it. Turned out to be an open bug report for Chrome(ium? I forget) where it's using the wrong color profile for css, and resulted in images not matching borders and backgrounds.