equivalent of (change) for lists?

I have a subpatch that spits out number pairs, and I only want something to happen when there is a change, ie. the equivalent of a change object that looks at the whole list.

How can I do this? Convert the list to a symbol using (tosymbol), then to a (change), then (fromsymbol)?

Or unpack the list, send each element through a (change), and then back to a (pak)?