Kaua`i is a very laid back, rural, and lush island with a nice variety of scenic and natural wonders but very little night life. Maui is over twice the size of Kaua`i in land area, has well developed resort areas and tourist infrastructure, also offers scenic and natural wonders, has a night life, but is no where as urban as Honolulu.

There are more hotel properties in Waikiki, so your price options are better. There are no HH properties that I recall on Kaua`i or Maui.