Thanks Cali and Darnold. Given your experiences we will rule out Dewi.
Out of curiosity, do you remember why Dewi limits dive time to 60 mins? And on Damai, did you have to wait for other divers to surface if everyone was doing 70 mins dives? We like the flexibility, but usually get bored and cold after 60 mins so probably won't use the extra time.
On Damai II, which cabin between 5 and 6 do you recommend? Both seem to be 40 sqm, and from the photos it's difficult to tell the difference.
Would you say Damai and Arenui are the same standard, or what's the difference in the experience?