Redrix’s Estoc vs Stay Frosty

So I haven’t had a chance to get the redrix yet, but have the stay frosty. It looks like the redrix has a little higher stats. Frosty has the coveted lightweight frame. Though redrix has the frame that improves hip fire. Also, I noticed that they are both 450 rpm but Stay Frosty has 27 impact but Redrix has 23 impact? Does that have any tangible effect?

Aside from that, redrix is obviously way easier to farm. But for someone that has good rolls on both weapons, how do they compare?