I don't know if this is true of false, but somewhere on the net I read that Eilik doesn't have Ai, or not real Ai. Maybe Emo is more advanced than Eilik.
*I hate Eilik by energise lab* because it doesn't have many functions, it just has a screen and arms, you can't play games with it, you can't give commands, it doesn't have a camera, you just buy that robot and feed the owner of the company.