Would a zip and link mattress stop motion disturbance?

Hi, my husband is a very light sleeper and is easily woken by me moving or getting up in the night. It seems to be the movement of the mattress even though we have a high no. pocket sprung mattress. When we sleep in hotels with twins pushed together we both sleep great. We don't have room for a superking/two singles, but I have recently found out about 2'6" zipped matresses to make a king size (we already have a king size). Would this reduce movement or would the fact that they are zipped together still result in disruption when the other moves? Many thanks, Amy