The amounts do not have to be equal in anyway. The thrill that you experienced with your end will be just as high on her end. You are both forwarding on items that your mother's loved and giving them to someone who will appreciate and use them. Much better that they be forwarded than just sit around and have no use. And I am sure that both of your Moms would agree.
And youboth get the pleasure of knowing that something that was basically useless to you now has a new home where it will be used and appreciated as it should be. As your mom and hers would have wanted.