These are simply different models with more or less programmes and features.
TWH is the simple T1 heat pump dryer model: with DryCare 40 and SilenceDrum for quiet drying with maximum comfort.
TWL also has SteamFinish, and
TWR also has M Touch for the highest demands. Here is the link to the comparison overview
https://www.miele.ch/de/e/compare/11851440,11851490,11851520
The best thing to do is to contact our customer service directly at https://helpcenter.galaxus.ch/hc/de/requests/new. Then your request can be checked individually. :) LG