If you are using logos and/or electronic signatures you should be using the Regular Method in order to avoid repeating the e-signature/letterhead setup procedures, as outlined in technical bulletin JZ068
Unless...
Using Letterhead or electronic signatures?
The Quick Method is the quickest and simplest method of updating.
You will not need to manually update each document in the Resource Centre and MASTER file. The Resource Centre and the MASTER files will be overwritten with newer versions. The updates will only be performed in the client file(s).