I'm curious did you do any research yourself before posting?
There is a lot of easily findable information about each of these properties on FT and elsewhere.
Here are three threads that address your questions:
http://www.flyertalk.com/forum/le-cl...sukhumvit.html
http://www.flyertalk.com/forum/luxur...s-bangkok.html
http://www.flyertalk.com/forum/luxur...ai-hansar.html