Equality of instructions isn't clearly to be defined. You might wish, for example, to compare whether instructions have the same meaning. E.g., whether two INVOKEVIRTUALs describe the same call.

The DEFAULT comparator however, considers two instructions to be equal if they have same opcode and point to the same indexes (if any) in the constant pool or the same local variable index. Branch instructions must have the same target.