IC Suites
Sawadee Krup Khun Thongchai.
A few years ago, before the recent refurbishment I stayed in a high rise Ambassador Suite. I think it was on the 35th floor.
The room was around 60%-70% bigger than standard rooms and had a bigger bathroom, but it did not have a separate lounge like the corner suites.
I was upgraded to this suite because I had stayed 50 nights that year, however I preferred the corner suites because I was a smoker and I could smoke in the lounge without the smell going into the bedroom.
Like the Royal suite, I have never seen the Ambassador suite on the booking system.