Crochet girlfriend kitties🌸

Greetings friends! To sew or to crochet? Tough choice when I want to do both! But lately I've been busy comparing yarns to make crochet kitties. I have some listed on Etsy but would like to find the best yarn for white and black kitties. I used 100% cotton yarn to make them, and while mustard and gray colors are soft and beautiful, white and black yarns of the exact brand have a tougher texture. I'm looking for smooth finish with much less gaps.

These are made using the same pattern. All 4 types of the yarns used are #4 medium weight. I used 4mn hook for all. Do you see the difference?

I prefer natural material but acrylic might be the best choice for this project (B). Chenille (D) is super soft but a little difficult to crochet, because stitches are less visible and yarn brakes when you pull to close. Maybe chenille should be crocheted with a larger hook, since no problem with the gaps, though the finished product will be larger, unless the pattern is modified.