Ugg... Not to start an argument, but buy brand new E decks, and lay them unused side by side. They are the same thickness. Ghosts (which you say are thin) and black ghosts (which you say are thick) are both thick, in fact, any difference is not measurable. Trust me, I own LOADS of E cards, they were all i used until I found S&M. I have killed dozens of E decks over the past year and a half. Variations, and especially variations of feel, are flukes or differences in the wearing of the cards. The exact same cardstock and the exact same finish are applied. If you had a bad deck, it is probably from your own greasy hands holding them and ruining them right out of the box. If you don't ruin them via humidity, dirt or grease, they all fan better than your average card and work well enough for most purposes. If you are a person inclined to spring cards or do similar things, these cards are terrible for it at first because they are thicker, but they can be broken in.
When you pay money at E for cards, you already know what your new cards will feel like, they are the same. If they come and feel sticky, let them sit for a few days and get the humidity from shipping out of them. You buy the design at E. The same paper, colored, then the same finish.
But at the same time, I don't know why I argue this. They are still sub-par. If you want cool looking decks for certain reasons, then go buy them, they are above average and you will get your moneys worth. If you are actually looking for performance and durability in a card, you won't even be looking on E's website. You will be here or at dananddave.com looking at Smoke and Mirrors. Thinner, while more snappy and durable. Better finish, better cardstock, smoother fans, better response. If I am just out and about, I carry S&M. If I got to do a show, then I will bring a bag that has all the e-cards and t-11 cards, plus loads of others, just for options, but hands down the best quality is not from E, or directly from T11 either. If you have not tried them, do it. They have been the best investment I have made in magic so far. They last for ages, look sharp, and perform when you need them to.