As seen in this video, striders are supposed to be able to walk on top of mobs, treating their collision as solid: https://www.reddit.com/r/Minecraft/comments/hj9iwu/in_case_if_you_didnt_know_striders_can_walk_on/

This feature is missing in bedrock edition.

(Note that boats and minecarts are also supposed to have this property, and also currently do not in bedrock edition)