Clone

A "clone" is technically a robot that is a carbon copy of another bot, but the term is more used for very similar designs. Often (but not always) bears a negative connotation - calling someone else's bot a clone is often seen as criticism.

A similar term is "ripoff" - somehow like a clone, but less similar. Also often used when you take a design and implement it into anothr weightclass/mod (as an example, Clickbeetle called Hazardous Contraption a Neglected Waterbug clone, but Naryar would call it a NW ripoff rather than clone)