Fair enough.

It's certainly true that there are two different things being done by psychopaths and nonpsychopaths in the original example, but it might be that both of those things count as genuine moral beliefs, just as the two different things involving a stop sign can count as genuine beliefs about color.

OTOH, it might be that only one of them counts as a genuine moral belief, just as only one of the things involving a stop sign counts as a genuine perception of color.