The answer to 'which is worse carpenter ant or' is that carpenter ants are generally considered more problematic and damaging than most other ant species. Carpenter ants are capable of causing significant structural damage to homes and buildings by tunneling through wood to create their nests, while most other ants are more of a nuisance pest that do not cause direct structural damage.
Carpenter ants can be quite large, up to 1/2 inch long, and their tunneling and nesting habits can weaken the integrity of wooden structures over time. They also tend to be more difficult to fully eliminate from an infested home compared to other ant species. Proper identification and targeted treatment by a professional pest control expert is usually required to effectively control a carpenter ant problem.