It may not seem different to a layman but there is a huge difference. There is a myriad of wiring and monitors to support the equipment needed. The physical room is often larger to support the amount of personnel and equipment. The water supply has to be adequate for dialysis. There is a lot going on under the surface you don’t see
My recollection is that the room was smaller, the turlet was under a small roll-away box right next to the bed.
There was a large ante-room, then the hall.
I had no machines beyond a ubiquitous hospital IV infuser.
My understanding is that in the ICU there is a higher ratio of nurses/patient. That’s about it in my case.