What is the difference between tashabbuh and ikhtilat?

The student : Shaykh, is there a clear dividing line between tashabbuh and ikhtilat?

The Shaykh : Between what?
The student : Tashabbuh and ikhtilat, are they the same thing?

The Shaykh : By Allah, the first word was not clear.
The student : Tashabbuh, may Allah preserve you.

The Shaykh : Tashabbuh?
The student : Yes, tashabbuh: so-and-so has changed his hifz.

The Shaykh : Of course, meaning, may Allah bless you, this is not something hidden from you, if Allah wills; it is the beginnings of ikhtilat.
The student : Yes, exactly.

The Shaykh : Yes, that is right, or the light ikhtilat that is not considered a wound.
The student : A disqualifying defect.

The Shaykh: Yes.
The student : Praise be to Allah, that is what I believed.

The Shaykh : And that is what I thought you believed.
The student : May Allah reward you.

The Shaykh : There is no god but Allah.