Robot toy based on PiEEG:

Robot toy based on OpenBCI:

Robot toy based on EMOTIV

Emotiv says it is the the «Leader in EEG», and we clearly can see that Emotiv leads in this comparison of current robot toys over the other architectures. But if you really want to find out who is the leader in this discipline, check the scientific literature about this topic:

https://infozentrum.ethz.ch/en

Not in the scientific literature, but on YouTube, we found a:

Mind-controlled prosthetic developed at the University of Newcastle, Australia