Question regarding warmth of different types of wool (Hi Kat P.)

Can I tack angora onto that please? I know if is a rabbit fur, not wool; but one of the warmest handmade hats I have ever owned. Thanks smart people!

No expert here but I have worked with wool . Merino is also wool from a sheep, the Merino sheep. It is very fine and warm and very soft. As far as warmth and softness and feel, a lot also depends on the "gauge" or weight of the yarn, how it has been treated and how it is assembled into a garment.
Angora comes from the downy hair of a rabbit.
Merino and can vary a lot. The more " plied" or twisted it is, the stronger and bouncier it seems to be. If it is treated to make it machine washable, it loses some lanolin and will not shed water as well.
As far as warmth, in my experience the longer haired wool is warmer as it traps more air on it, but the longer hairs can make it itchy to some people.
I guess it all depends since there are so many factors involved including quality of the wool, the way it is treated, how it is spun, how tightly it is assembled.
Alpaca seems to be much warmer per ounce of wool but not as many people tolerate sweating in it as they do Merino.
I have not worked with Angora yet.
Qivut ( I think ) is an interesting " wool" from the downy hair of a musk ox. Supposedly the warmest wool, will not felt but is extremely expensive. Buy me a skein and I will make you a hat with it for free, just so I can experience it :)

Thanks Kat! As I suspected, it's not as cut and dry as I had hoped, and the answer depends on many different factors. Thank you for your insights though…extremely helpful!