There are some differences between Centre Block and the new spaces. The new spaces are smaller and access to certain places is restricted for visitors.
For instance, when the House sits, we will not be able to have guided tours for groups in both houses. So, it will not be possible for participants in these guided tours to listen to debates when the House sits.
However, if a visitor who is not a part of a guided tour group wants to go to the galleries to listen to debates, that will continue to be possible.