@SunSun - the general course of the story remains the same, but details are completely changed. For example, in the WN, MC did not visit the giant village, and one of the daughters of Muno got their help on her own.
Sorry, it's hard for me to keep the two storylines separate, they always mix in my head.
One notable difference is, a lot of people say that WN Pochi and Tama are furries (dog-kin and cat-kin, instead of dog-ear-kin and cat-ear-kin like in the LN and manga), but since their appearance is never described, I tend to imagine them as their anime versions anyway.