You can use either.

For the task of muting, there would be no difference, audible or even datawise.

End result can and should sound the same.

Expression CC11 only differs at the OTHER end -- how loud it can get -- and that is dependant upon where CC7 has already been set, if it has, anyway.

That job, the end result, is up to you, your ears and your musical tastes and knowledge.


--Mac