Use different speaker cables vs same cables when bi-amp

Hello,
My amp allows bi-amp (4 speakers posts for each channel). I am using 99.99% pure Silver speakers cable for high band and tinned copper (Belden 9497) for low band (option 1)

However, when I compared the option 1 above with option 2 (identical tinned copper cables for both high and low bands). Option 2 doesn’t have airy, excellent high and dynamic as option 1.

On the contrary, Option 2 provide better integrity in the sound, better image, I can pinpoint the instruments better. When female and male singers sing at the same time, I can separate the 2 voices apart better. However, as stated above, option 2 lacks airy, detailed and dynamic traits of option 1. The difference is noticeable not minor.

My question is if it’s normal to use different cables for high and low bands. Are these drawbacks (decrease in integrity and image) expected when using different cables for high and low bands?

Thank you.
Huy