Do they have hairdryers on the Sun?Book mentions Sky has them in room descriptions but nothing mention for Sun.
Also what is the difference between Superior and regular inside cabins.They both look the same?
Yes, there are dryers, but if you have hair that takes a long time to dry you may want to bring your own. Like the dryers in hotels rooms they aren't all that powerful. They worked great for me cause God forgot to give me much hair. As for the difference in the cabins, I don't know for sure, but the superior are going to be on higher decks and probably a few more sq feet.
I used the hair dryers on my recent Panama canal cruise on the sun - they are located in the bathroom and have three setting from slow to fast - it didn't take long for me to dry my hair - I had an deluxe inside cabin and a large deluxe on my two part cruise - the large deluxe had a full couch while the deluxe had a half couch - both were a fair size.
Just another comment about the hair dryers. They do work fine, but they are located behind you in the bathroom, so it can a little awkward to dry your hair if you need to do it with a mirror in sight. I think I would pack my own dryer next time around.