Yes! My father's socks were done well in advance of Father's day (thank you for asking).
I was right and the second yarn was thinner than the first, but I knit the second sock with the same needles and the same stitch count the result being that one sock is lighter than the other. Dad tried them on and they both fit about the same. I bet they'll wear different.
My mom forgot to bring her knitting, so while she was visiting I put her to work on my first pair of handspun socks and she finished up the cuff for me.
One of these socks was spun too tightly, and the other was spun looser, but knit too tightly. The result: they both are stiff and tough to pull on. Now I've relearned the lesson about the trade off between durability and comfort. You know the one, you can knit a durable sock at a really tight gauge, but will you enjoy knitting it and will the owner enjoy wearing it? Turns out the same thing applies to spinning. Who knew?
Finally, I captured a magical, musical moment in digital space forever (or as near as we can get). Please enjoy the musical stylings of Alex, my trumpet player: