The H100i series seems cool better by around 6 degrees max. Not to mention the v2 is 10 dollars cheaper on most sights. If you REALLY like the product, it wont be a huge difference, but it saves you money and gives better performance to go with the h100i v2. I have it and I highly reccommend.
Thank You very much for your answer cmduplain. Now without a doubt, H100i series is the cooler that I should purchase.