Absolutely wool is one of the most distinguishable, as posted up thread , you get different grades of wool, with the cheaper jumpers being made from wool from mature sheep, which results in a scratchy rougher type product, as it’s thicker and coarser,m or they do a wool blend, often with acrylic, to try to make it softer due to the poor wool used, A high end wool like a grade A cashmere is a whole different feel and look as is a higher end wool.
You even get different grades of merino and lambs wool, which is easily , distinguishable. You can tell by look, feel and also performance, for example high end wool will just snap back and retain its shape.low quality cheap wool, will feel coarse and will not retain its shape.
even different cashmere are easily distiguishable, I have a markies cashmere jumper and a me and em cashmere tank, the quality in difference is so huge they look to be made of different materials entirely, from the softness to the appearance to how they hold their shape.
even t shirts it’s noticeable, cotton comes in different grades.and there are huge differences in the quality, the feel, the performance depending on the quality and grade of the cotton used.