system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Is there actually any significant difference in the chemical composition of household cleaners which claim to be for the "kitchen" or "bathroom", or are they all basically the same thing?
gpt
Not in their chemical composition but in their physical composition. Bathroom usually means ceramic tile and porcelain and kitchen usually means linoleum, stainless steel, and veneer cabinetry. 

Ceramics are hard. In fact they are some of the hardest materials found in most homes short of glass, silica, or diamond. So a bathroom cleaner will usually contain a softer but abrasive agent to help scrub dirt and grime off of tiles but without scratching them. Because tile and porcelain are so hard, you can use some pretty abrasive stuff without fear of scratching them. However if you use them on plastics, linoleum, or veneers they can scratch and gouge them. 

Some of the most abrasive cleaners will have warnings about which surfaces they can be used on. Their abrasive qualities however make quick work of hard water stains and soap scum such as in a shower or toilet. You wouldn't want to use them on a stainless steel sink though.