the problem, again for you is, if your asking or thinking someone else will say GOOD or bad, your NOT goping to get any honest help that way
as what someone elses feet will handle in cold might again NOT be what your's will
I can sit for house in sneakers in 20 degree dasy, but doubt you will, and only difference is MY feet as to YOUR feet!, its NOT always the boot that matters
its how ONE person handles cold as to how you do!

and as you already stated, your more sensitive to cold than many others are(or IMO, no bad intentions meant just saying)
and that more sensitive to cold, might be from a LOT of things, from health reasons to just body type and where you LIVE
folks that live in warmer ALL yr pl;aces , tend to find cold harder to deal with, and vice versa
this is again why reviews never tell the story on how they will work for YOU, as to other's!
the schnee's I ,listed state good for non active temps to 20 , and the sorels claim OK to minus a 100, but I doubt that is in non active situations for long!
I might last 5 times longer in same boots as you will, due to I tolerate cold better than most due and again, its just like HOW one boot fits YOUR feet and how same boot might fit MY feet, ALL feet are not created the same, so, a general size and molding ONE company uses is Not going top work for ALL feet
and FIT is a BIG part of how well a boot works

sadly about all you can really do, is buy things based on materials and designs, and FIT to YOU, it sucks and can get costly, but its the nature of the beast!, and trust me I have spent an embarassing amount of $$ on hunting and cold weather gear over the yrs to p[rove this point, ain;'t NO magic item out thee I am aware of!

I again, would also suggest talking to a good foot DR, never know, might have something slowing blood flow or?? and its causing your toes to get cold sooner than needed, this again can happen from fitment issue's putting pressure on veins and slowing blood even slightly can make them get old faster!
same can be said if you have any heart issue's,a s its your heart that cycles the warm blood to toes and there the farthest away from the heart, thus why they get cold fastest, is any heart issue
s that will make blood flow slower or weaker and thus, cold toes faster!
same with many med's we use that THIN blood or thicken it, never under estimate health issue when you get CLOD faster or slower!
a heater body suit type clothing might really benefit you too over just new boots, as it will help keep your core warmer longer ans that will allow for warmer blood to be flowing to ALL things!