Less advanced in symbolic thinking and communicating. There are other forms of thinking (like fast tactical thinking, some predators are conceivably better at this than most humans) and communicating (emotional communication; if we could quantify that I would bet on elephants).
Orcas are better at communicating than humans are, their languages more directly resembles telepathy than the “encode thoughts into grunts that then need to be decoded” that we have. They are essentially beaming waveform pictures to each other
