Zangetsu and Nozarashi

I watched Bleach several times. I read Bleach several times. One thing that always catches my attention is the form of Ichigos Zanpakuto and the form of Kenpachis Zanpakuto.

Zanpakuto can and will change their form in the different release states. Some transform into leafes, colors or form.

Most notably for me is the change for Zangetsu and Nozarashi as they both change their forms and are somehow resembling each other. In some of Zangetsus forms, the blade don't have a Tsuba, both look like a gigantic kitchen knife.

Most notably for me is Ichigos Shikai after the fullbring Arc and Kenpachis Shikai. Sure Kenpachis Blade is cut and not a completely formed blade but the curves and overall design is similiar in my eyes.

Question: do I see to much? 😅 Possibly. Does anyone else also sees this and has explanations?