1. How do you indicate that comparison is possible?
2. What happens when the first item is added for comparison?
3. Have we disabled the option to compare only one selected item?
4. How do we highlight a product selected for comparison?
5. Do we display a comparison bar or a modal after adding to compare?
6. How do users unselect a selected option?
7. Should we suggest products to compare at some point?
8. How many items can a customer add for comparison?
9. Do we use animation or transitions to display comparison?
10. Do we display the price, ratings, a thumbnail and the reference number?
11. Can users switch to see only differences/similarities/all?
12. Do we group and collapse attributes by default?
13. Do we track attributes consistency/comparable metadata?
14. Do we highlight columns and rows on hover or tap?
15. Can the user move columns left and right?
16. What if users compare items in unrelated categories?
17. How do we allow users to add more items for comparison?
18. How do we allow users to remove items from comparison?
19. Should we ask customers to choose preferred attributes?