"WE ALSO LOVE" Algorithm

I need advise understanding what makes more sense in ecommerce.

If I am selling furniture, and if I have a “WE ALSO LOVE” module on the site, what should I promote there with my algorithm capability.

If user is searching for sofas, should I show other sofas from the same color, size and style?

Or should I show, an armchair that goes well with that sofa, and a coffee table and a rug that goes well with it?

Is it confusing to show more similar items to the user? If she found the sofa she liked, is it worth, showing her more sofas?

Thanks,
Eli

Consider this problem from the perspective of the user. If I am looking for a sofa, I will only recommend a sofa. When I form a real consumption, I will be more satisfied with the carpet that matches it