I have both types. Bought two Aspires first but as I found the juice level hard to see in certain lights with my old minces, I bought the Anyvape Davide version. Differences? Like my old head, not a lot in it really vape wise but considering the Davides are twice the price, is the larger and clearer tank worth it? Maybe not if you have decent eyesight or budget restrictions.
Also, a word to the wise on the Davide. I'm hazarding a guess here but I think that after they made the originals and tested them, they found leak issues caused by the heads or the main centre posts being a mite short, as they didn't meet tightly in the middle of the tank. They solved this by inserting a silicone filler-piece between the head and the post. However this only remains in place due to the pressure placed on it by screwing the head in. Once you've removed the head, this silicon spacer becomes mobile. So be warned.
One thing I don't like about both is the fact they are not rebuildable (at the moment) and therefore buyers are at the mercy of manufacturers/vendors providing enough spare heads to meet the market. The Protank 3 at least comes with two rebuildable heads but then some cynics may well point out it also means twice the trouble.