I've stayed in the Suite Jardin with terrace. As far as I can tell the room size does not include the terrace. If you notice the Atelier rooms are a bit larger and have no terrace but a slanted wall of windows. It's basically that slant that is what would otherwise be terrace space if that makes sense. The Jr Suite is large but to be honest I didn't think the extra space added much over the Executive Room with Terrace. In both rooms you get a mini bar credenza with lots of space on top to place personal items. In the Jr Suite you have a couch and a desk which is not in the Executive Room. I found the placement of the couch a little awkward as it's right in front of the curtains and windows. Otherwise the room felt slightly deeper , wider and the bathroom is a bit bigger. I am a solo traveler so I found that extra space unneeded and I really didnt use the couch. All that being said it is a nice large room.

I have had zero problems with noise. I basically never hear anyone. Very quiet rooms.

I'm attaching the one photo I took of the room and you can see the couch. I didn't really care for how the little table was in front of the couch with the chair and the stool. In the Executive room you have a mini bar credenza and a small table with two of the chairs that you see at the desk in the Jr Suite.