Difference is it's easier to avoid spoilers 3 days out then 13 days out. The longer they're out there, the more people that see it, the further it's spread, and the easier it is for you to stumble upon it.
Gotta do what you can to mitigate then. We live in the internet age where information travels so fast it's insane. Even 3 days out is enough to spread any information. Hell we knew the main story beats for TFA like a year before the movie came out and that was without people recording low quality footage and taking pics.
Just do your best to avoid anything UC4.