I believe that the difference is that the polymide (nylon IIRC) component accounts for the absorption performance. As far as quality towels, the ratio does not seem to be a factor as I have quality towels in the following weaves: 70/30, 75/25, 80/20, 85/15 and even a couple of excellent glass specific towels made in Japan which are a 50/50 blend.
I use Micro Restore on warm water and dry them with no heat and two blue dryer balls. I'm actually transferring my towels from the wash into the dryer as we speek!
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