As a small point, it pays to be aware that there are differences in the two RV but on the breaker for the sofa, it is the same. If it were other circuits, things are different.
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I did a search for the sofa circuit and found this, showing it as the EEC circuit:
With that info we can look at the breakers and find it here on the 2012 Suncruiser:
And the same location for this circuit on the 2016 Adventurer but if we look at the other breakers, there are several other circuits which are different and that could leave a hazard if we assume they are the same RV!
Point to keep in mind is that we should never trust a salesman's word that they are the same RV!!
When shopping, if these have a label on the side, like possibly a Carling, it can be easier to find them at a local electronics store if they cross referance the model. RV parts are often so much harder to find than the switch for all the other things that use the same switch! Lots more places that sell switches than sell RV parts!
I've never dug into the couch switch but many of the other switches on our RV are Carling which is a very common name for switches.