I would advise you to check tripadviser, the British webpage (I am not sure about the correct name). There you will find evaluations of former hotel guests. If you simply google the hotel names you should be able to find similar pages.
I know Dinarobin from the beach side as I spent two weeks at Les Pavillons, which is located in the direct neighbourhood. It looked really good and I have not read any negative comment so far. The latter goes also for The Residence, which friends of mine visited while spending their holidays in the vicinity. They talked quite enthusiastic about it.
All in all I am sure that you will come to the correct decision if you take your time and gather some information via the internet.
Enjoy your time on this beautfil island!
All the best from