TeT - not exactly the same but the range of attitude change with speed is markedly reduced by the horizontal stab.
You may have a helicopter that has less than a 2 or 3 degree pitch attitude range across a 120kt speed range. Try flying speeds in 10 kt increments accurately just using attitude.
If you fly a helo with a small horizontal stab (R22) for example you will see a bigger range of attitude with speed but grown-up helicopters tend to be a bit more refined.
The whole point of my comment was that disc attitude is a poor guide to best auto speed and whilst showing it to a student may help them understand why best auto speed is what it is, it doesn't help much when flying autos since the ASI is the more accurate guide.