I do enjoy Memory Tapes and Real Estate, Ducktails not so much. But I would put Memory Tapes in a far different, far superior category, as its dominance of electronics allows for much more experimentation in my opinion. I too enjoyed Beach Fossils' prior album, but this doesn't feel new and it certainly feels like a waste of money if you already have that album. There's nothing wrong with a band having a sound and using that sound for their whole career, but for my money I need to have some sort of change between tunes and certainly between albums.
Money issue = Mediafire. But on a serious note, I see where you are coming from with Memory Tapes. I also think he has a lot more offer sonically compared to the more straightforward surf pop guitar work of Real Estate. I don't see how you like Real Estate, but not Ducktails - it's the guitarist's solo project. He does a bit more analog-type recording, but it's essentially the same guitar work/floating vibe. "Killing the Vibe" is one of my favorite songs so far this year - you should check it out. Like I said before, I haven't given this EP a listen yet, so I can't really weigh it against the full length, which I loved. A little off subject - have you checked out the new Cloud Nothings record? You'd probably dig it.
I'd also have to disagree with the "changing between albums" argument. There has to be cases where you want bands you listen to remain somewhat constant when it comes to their overall sound. Again, you have to realize that this is just an EP and not a full length, which does make a difference.