Its not necessarily better to fade, it just depends on your situation. DA'd and DF'd are the same thing, except when you DA you send official notice that you are no longer a JW, when you are DF'd the org decides that you are no longer a JW due to some type of wrongdoing. You can consider a fade like slipping out the back door or quietly dropping off the radar but it basically means you are inactive in every since - no field service, no meetings, nothing. People usually fade because they have JW family and do not want to be shunned.
Honestly, I have considered DA'ing myself and cutting all ties with the JWs but most of my immediately family are JWs. Also, I eventually realized that I shouldn't marry or date a DA'd or DF'd person because I would still end up being shunned...LOL...isn't life a real trip.