The net effect of both text is the same;
Warbot : +1/+1 for every additional/other robot in play
Speedbot : -2 energy to deploy for every additional/other robot in play.
Both text are trying to make it clear that the card itself is not considered when calculating the bonus/discount, only other robots in play at the time.
Chris:Thank you very much for your answer. Now I totally understand it.Thanks a lot~