I have a lingering suspicion that the travelers are short-changed in LHB coaches. I feel (my feeling, I have not measured that) that the berths are made smaller and somehow not as comfortable as ICF coaches.
This is my feeling after travelling in LHB coaches (both 3AC and 2AC). And if you get SU/SL then it is worst (try travelling with a 1 year old baby :-().
I know that LHB is great for speed and safety, but what about passenger comfort?