Not sure about service quality. But two bedded and four bedded, they don't allow hubby/ closed one to stay in overnight. Just went for the hospital tour yesterday. In future (not sure when), from moh, the hospitals wanna encourage babies to be with mummies instead in nursery Room. So for me, could be a concern like other babies crying etc, affecting sleep in two/four bedded.
I was 2 bedded but quite satisfy with the nurse in tmc.
2 bedded for slightly better privacy
Single bedded is the best
I think not much diff
Not much difference